阅读说明：本技术 一种苯并氮杂七元环化合物、其制备方法及用途 (Benzazepine seven-membered ring compound, preparation method and application thereof ) 是由 李青竹 贾志强 陈林 张斌 李俊龙 李江红 张翔 漆婷 戴青松 于 2020-12-15 设计创作，主要内容包括：本发明公开了一种苯并氮杂七元环化合物,具有如下结构通式：还提供了制备所述化合物的制备方法,包括以下步骤：将MBH底物(1.0eq)、取代的苯甲酰基硫盐、碳酸钾和三氟甲磺酸亚铁加入反应试管中,加入DCE作为溶剂,反应72小时,TLC监测反应完成后纯化浓缩得目标产物。本发明的有点在于,提供了一种制备所述苯并氮杂七元环化合物的能够扩大生产、规模生产的制备方法,所采用的反应底物原材料很容易获取,制备方法反应条件容易实现,最大限度地缩短了反应时间,同时又能够得到高收率。(The invention discloses a benzazepine seven-membered ring compound, which has the following structural general formula:)

1. A benzazepine seven-membered ring compound having the following structural formula:

in the above chemical structural formula: r¹Any one atom or group selected from H, Me;

R²any one atom or group selected from H, Me;

R³any atom or group selected from H, F, Cl, Br and Me;

R⁴any atom or group selected from H, Cl and OMe;

R⁵any atom or group selected from Me and Et;

R⁶selected from various substituted phenyl, aromatic heterocyclic and naphthalene rings.

2. The benzazepine seven-membered ring compound according to claim 1, wherein said compound is selected from one of the following structural formulas:

3. a process for the preparation of a compound according to claim 1 or 2, comprising the steps of: adding an MBH substrate (1.0eq), substituted benzoyl sulfide, potassium carbonate and ferrous trifluoromethanesulfonate into a reaction test tube, adding DCE as a solvent, reacting for 72 hours, and purifying and concentrating after TLC monitoring reaction is finished to obtain a target product;

the technical route for preparing the compounds is shown below:

4. the production method according to claim 3, characterized in that: the preparation of the substrate 1a is as follows:

(1) in a 100mL reaction flask, substituted 2-aminobenzoic acid (10mmol) was added, the solvent THF was added at 30mL, and then LiAlH was slowly added under ice bath conditions₄(40mmol), stirring at room temperature for 1h, monitoring by TLC after the reaction is finished, slowly adding ice water for quenching, filtering by using kieselguhr, extracting by using ethyl acetate, collecting an organic phase, drying, and spin-drying to obtain a crude product without further purificationThen carrying out the next reaction;

(2) in a 100mL reaction flask, the substituted anthranilic alcohol (8.7mmol), NaHCO were first weighed₃(10.4mmol), then adding 1.4-dioxane and 20mL of water (v/v is 1:1), finally slowly dropwise adding ethyl chloroformate (9.6mmol) in an ice bath, stirring at room temperature for 2h, after TLC monitoring reaction is finished, extracting with ethyl acetate, collecting an organic phase, drying, and spin-drying to obtain a crude product, wherein the crude product is directly subjected to the next reaction without further purification;

(3) weighing the product (9.0mmol) in the previous step in a 100mL reaction bottle, adding 30mL of DCM, adding PCC (9.0mmol), stirring at room temperature for 12h, monitoring the reaction by TLC, filtering with diatomite, collecting filtrate, spin-drying, and separating and purifying by column chromatography to obtain the product;

(4) weighing the product (8.0mmol) of the previous step, DABCO (8.0mmol), triethanolamine (6.5mmol) and methyl acrylate (24.0mmol) in a 25mL reaction bottle, stirring at room temperature for 12h, monitoring the reaction by TLC, extracting with ethyl acetate, collecting an organic phase, drying, spin-drying, and carrying out column chromatography separation and purification to obtain a product;

(5) adding a substrate (3.2mmol) and p-toluenesulfonic acid (1.6mmol) into a 100mL reaction bottle, dissolving in 30mL toluene, reacting at 100 ℃ for 1h, monitoring by TLC, cooling the reaction solution, adding water, extracting with ethyl acetate, collecting an organic phase, drying, spin-drying, and separating and purifying by column chromatography to obtain a product;

the route for preparing the substrate 1b from the benzoylthio salt is as follows:

r is alkyl, thiophene, furan or naphthyl.

5. Use of a benzazepine seven-membered ring compound according to any one of claims 1-2, wherein the compound is used for antibacterial use.

Technical Field

The invention belongs to the technical field of compounds, and particularly relates to a benzazepine seven-membered ring compound, a preparation method and application thereof.

Background

The benzazepine seven-membered ring skeleton widely exists in natural products and synthetic drugs, related researches show that the compound containing the skeleton has various important biological activities and pharmaceutical activities, and the modification of substituent groups of the compound, the derivatization of structural analogues and the further re-evaluation of the biological activities become research hotspots.

How to simply prepare the benzazepine heptacyclic compound with high yield is the difficulty of the current research.

Disclosure of Invention

The invention discloses a benzo-aza seven-membered ring compound, a preparation method and application thereof, aiming at providing a method for simply preparing the benzo-aza seven-membered ring compound and obtaining high yield, and the invention aims at exploring a simple synthesis method of the benzo-aza seven-membered ring compound, wherein the reaction condition is easy to operate, the yield is high, and the adopted raw material substrate is easy to obtain.

In order to achieve the purpose, the technical scheme disclosed by the invention is as follows: a benzazepine seven-membered ring compound having the following structural formula:

in the above chemical structural formula: r¹Any one atom or group selected from H, Me;

R²any one atom or group selected from H, Me;

R³selected from any of H, F, Cl, Br and MeAn atom or group;

R⁴any atom or group selected from H, Cl and OMe;

R⁵any atom or group selected from Me and Et;

R⁶selected from various mono-substituted and multi-substituted phenyl, heteroaryl and naphthyl.

Further, the compound is selected from one of the following structural formulas:

the invention also provides a method for preparing the compound, which comprises the following steps: adding an MBH substrate (1.0eq), substituted benzoyl sulfide, potassium carbonate and ferrous trifluoromethanesulfonate into a reaction test tube, adding DCE as a solvent, reacting for 72 hours, and purifying and concentrating after TLC monitoring reaction is finished to obtain a target product; the technical route for preparing the compounds is shown below:

further, the substrate 1a was prepared as follows:

(1) in a 100mL reaction flask, substituted 2-aminobenzoic acid (10mmol) was added, the solvent THF was added at 30mL, and then LiAlH was slowly added under ice bath conditions₄(40mmol), stirring at room temperature for 1h, monitoring by TLC after the reaction is finished, slowly adding ice water for quenching, filtering by using kieselguhr, extracting by using ethyl acetate, collecting an organic phase, drying, and spin-drying to obtain a crude product, wherein the crude product is directly subjected to the next reaction without further purification;

(2) in a 100mL reaction flask, the substituted anthranilic alcohol (8.7mmol), NaHCO were first weighed₃(10.4mmol), then adding 1.4-dioxane and 20mL of water (v/v is 1:1), finally slowly dropwise adding ethyl chloroformate (9.6mmol) in an ice bath, stirring at room temperature for 2h, after TLC monitoring reaction is finished, extracting with ethyl acetate, collecting an organic phase, drying, and spin-drying to obtain a crude product, wherein the crude product is directly subjected to the next reaction without further purification;

(3) weighing the product (9.0mmol) in the previous step in a 100mL reaction bottle, adding 30mL of DCM, adding PCC (9.0mmol), stirring at room temperature for 12h, monitoring the reaction by TLC, filtering with diatomite, collecting filtrate, spin-drying, and separating and purifying by column chromatography to obtain the product;

(4) weighing the product (8.0mmol) of the previous step, DABCO (8.0mmol), triethanolamine (6.5mmol) and methyl acrylate (24.0mmol) in a 25mL reaction bottle, stirring at room temperature for 12h, monitoring the reaction by TLC, extracting with ethyl acetate, collecting an organic phase, drying, spin-drying, and carrying out column chromatography separation and purification to obtain a product;

(5) adding a substrate (3.2mmol) and p-toluenesulfonic acid (1.6mmol) into a 100mL reaction bottle, dissolving in 30mL toluene, reacting at 100 ℃ for 1h, monitoring by TLC, cooling the reaction solution, adding water, extracting with ethyl acetate, collecting an organic phase, drying, spin-drying, and separating and purifying by column chromatography to obtain a product;

the route for preparing the substrate 1b from the benzoylthio salt is as follows:

r is alkyl, thiophene, furan or naphthyl.

The invention also finds that the benzazepine seven-membered ring compounds have antibacterial activity.

The invention has the beneficial effects that: the preparation method for preparing the benzazepine heptatomic ring compound can be used for large-scale production, the adopted reaction substrate raw materials are easy to obtain, the reaction conditions of the preparation method are easy to realize, the reaction time is shortened to the maximum extent, and high yield can be obtained.

Drawings

FIG. 1 is a crystal structure of a compound according to an embodiment of the present invention.

Detailed Description

The present invention is described in further detail below with reference to specific examples. The reagents used in the present invention are commercially available, and are not specifically described, and the prior art or natural conditions at normal temperature and pressure are used.

The first embodiment is as follows: the invention provides a benzazepine seven-membered ring compound, which has the following structural general formula:

R¹is H, R²Is H, R³Is H, R⁴Is H, R⁵Is Me, R⁶For phenyl, the structure is defined as the basic entity having the formula:

the single crystal structure of the basic body is shown in fig. 1, and the data such as the molecular structure are shown in the following table:

a process for preparing a compound having the formula:

adding an MBH substrate (1.0eq), substituted benzoyl sulfide, potassium carbonate and ferrous trifluoromethanesulfonate into a reaction test tube, adding DCE as a solvent, reacting for 72 hours, and purifying and concentrating after TLC monitoring reaction is finished to obtain a target product;

the technical route for preparing the compounds is shown below:

further, the substrate 1a was prepared as follows:

(1) in a 100mL reaction flask, substituted 2-aminobenzoic acid (10mmol) was added, the solvent THF was added at 30mL, and then LiAlH was slowly added under ice bath conditions₄(40mmol), stirring at room temperature for 1h, monitoring by TLC after the reaction is finished, slowly adding ice water for quenching, filtering by using kieselguhr, extracting by using ethyl acetate, collecting an organic phase, drying, and spin-drying to obtain a crude product, wherein the crude product is directly subjected to the next reaction without further purification;

(2) in a 100mL reaction flask, the substituted anthranilic alcohol (8.7mmol), NaHCO were first weighed₃(10.4mmol), then adding 1.4-dioxane and 20mL of water (v/v is 1:1), finally slowly dropwise adding ethyl chloroformate (9.6mmol) in an ice bath, stirring at room temperature for 2h, after TLC monitoring reaction is finished, extracting with ethyl acetate, collecting an organic phase, drying, and spin-drying to obtain a crude product, wherein the crude product is directly subjected to the next reaction without further purification;

(3) weighing the product (9.0mmol) in the last step in a 100mL reaction bottle, adding DCM30mL, adding PCC (9.0mmol), stirring at room temperature for 12h, monitoring the reaction by TLC, filtering with diatomite, collecting filtrate, spin-drying, and separating and purifying by column chromatography to obtain the product;

(4) weighing the product (8.0mmol) of the previous step, DABCO (8.0mmol), triethanolamine (6.5mmol) and methyl acrylate (24.0mmol) in a 25mL reaction bottle, stirring at room temperature for 12h, monitoring the reaction by TLC, extracting with ethyl acetate, collecting an organic phase, drying, spin-drying, and carrying out column chromatography separation and purification to obtain a product;

(5) adding a substrate (3.2mmol) and p-toluenesulfonic acid (1.6mmol) into a 100mL reaction bottle, dissolving in 30mL toluene, reacting at 100 ℃ for 1h, monitoring by TLC, cooling the reaction solution, adding water, extracting with ethyl acetate, collecting an organic phase, drying, spin-drying, and separating and purifying by column chromatography to obtain a product;

the route for preparing the substrate 1b from the benzoylthio salt is as follows:

r is alkyl, thiophene, furan or naphthyl.

The structural general formula of the benzazepine seven-membered ring compound of the invention is R¹Selected from H,Any one atom or group of Me;

R²any one atom or group selected from H, Me;

R³any atom or group selected from H, F, Cl, Br and Me;

R⁴any atom or group selected from H, Cl and OMe;

R⁵any atom or group selected from Me and Et;

R⁶selected from various substituted phenyl, aromatic heterocyclic and naphthalene rings.

The following are specific examples of compounds that may be substituted by the preparation process of the present invention:

compound 1:

2-benzoyl-2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

methyl 2-benzoyl-2,3-dihydro-1H-benzo[b]azepine-4-carboxylate

(benzoyl-substituted thionate for synthetic substrate)

Yellow solid, yield 82%.

¹H NMR(600MHz,CDCl₃):δ(ppm):7.93(d,J＝7.2Hz,2H),7.81(s 1H),7.62(t,J＝7.2Hz,1H),7.51(t,J＝7.8Hz,2H),7.30(d,J＝7.8Hz,1H),7.17(t,J＝8.4Hz,1H),6.82–6.78(m,2H),5.72(brs,1H),4.68(d,J＝9.6Hz,1H),3.78(s,3H),3.59(d,J＝17.4Hz,1H),2.50(dd,J＝17.4,9.0Hz,1H).

¹³C NMR(150MHz,CDCl₃):δ(ppm):198.1,168.2,147.9,140.7,135.8,134.1,133.9,130.7,128.9,128.8,126.3,119.7,118.7,117.8,58.7,52.1,37.9..

Compound 2:

2- (4-fluorobenzoyl) -2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester:

(4-fluoro-substituted benzoyl sulfide salt for synthetic substrate)

The yield of yellow solid was 79%.

¹H NMR(600MHz,CDCl₃):δ(ppm):δ(ppm):7.99–7.96(m,2H),7.80(s,1H),7.29(d,J＝7.8Hz,1H),7.20–7.15(m,3H),6.82–6.77(m,2H),5.68(brs,1H),4.63(d,J＝9.6Hz,1H),3.79(s,3H),3.57(d,J＝17.4Hz,1H),2.48(dd,J＝12.0,9.0Hz,1H).

¹³C NMR(150MHz,CDCl₃):δ(ppm):196.5,168.2,166.1(J_C-F＝257.3Hz),147.7,140.7,135.8,131.6(J_C-F＝8.8Hz),130.8,130.4,126.2,119.6,118.3(J_C-F＝131.5Hz),116.2(J_C-F＝23.1Hz),58.7,52.1,37.9.

Compound 3:

2- (4-chlorobenzoyl) -2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(4-chloro-substituted benzoyl sulfide salt for synthetic substrate)

The yield of yellow solid was 88%.

¹H NMR(600MHz,CDCl₃):δ(ppm):7.88(d,J＝6.0Hz,2H),7.80(s 1H),7.49(d,J＝12.6Hz,2H),7.29(d,J＝7.2Hz,1H),7.18(t,J＝6.6Hz,1H),6.82–6.77(m,2H),5.67(brs,1H),4.62(d,J＝9.0Hz,1H),3.79(s,3H),3.55(d,J＝15.6Hz,1H),2.48(dd,J＝16.8,9.6Hz,1H).

¹³C NMR(150MHz,CDCl₃):δ(ppm):197.0,168.1,147.7,140.8,140.5,135.8,132.3,130.8,130.2,129.3,126.1,119.6,118.8,117.9,58.8,52.2,37.9.

Compound 4:

2- (4-Bromobenzoyl) -2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(Synthesis of substrate with 4-bromo substituted benzoyl sulfate)

The yield of yellow solid was 86%.

¹H NMR(600MHz,CDCl₃):δ(ppm):7.81–7.79(m,3H),7.66(d,J＝8.4Hz,2H),7.30(d,J＝7.8Hz,1H),7.18(t,J＝8.4Hz,1H),6.82–6.78(m,2H),5.67(brs,1H),4.62(d,J＝9.6Hz,1H),3.79(s,3H),3.55(d,J＝17.4Hz,1H),2.48(dd,J＝17.4,9.6Hz,1H).

¹³C NMR(150MHz,CDCl₃):δ(ppm):197.2,168.1,147.7,140.8,135.8,132.8,132.3,130.8,130.3,129.3,126.1,119.6,118.8,117.9,58.7,52.2,37.8.

Compound 5:

2- (4-methylbenzoyl) -2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(4-methyl-substituted benzoyl sulfide salt for synthetic substrate)

The yield of yellow solid was 76%.

¹H NMR(600MHz,CDCl₃):δ(ppm):7.83(d,J＝8.4Hz,2H),7.80(s,1H),7.31–7.29(m,3H),7.17(t,J＝11.4Hz,1H),6.81–6.77(m,2H),5.73(brs,1H),4.64(d,J＝9.0Hz,1H),3.79(s,3H),3.59(d,J＝17.4Hz,1H),2.48(dd,J＝12.0,9.0Hz,1H),2.43(s,3H).

¹³C NMR(150MHz,CDCl₃):δ(ppm):197.7,168.2,147.9,144.9,140.7,135.8,131.5,130.7,129.6,129.0,126.4,119.6,118.6,117.8,58.6,52.1,38.1,21.7.

Compound 6:

2- (4-Methoxybenzoyl) -2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(4-methoxy-substituted benzoyl sulfide salt as substrate)

The yield of yellow solid was 54%.

¹H NMR(600MHz,CDCl₃):δ(ppm):7.92(d,J＝9.0Hz,2H),7.80(s,1H),7.29(d,J＝7.8Hz,1H),7.17(t,J＝7.2Hz,1H),6.98(t,J＝9.0Hz,2H),6.80-6.77(m,2H),5.73(brs,1H),4.61(d,J＝12.6Hz,1H),3.89(s,3H),3.79(s,3H),3.60(d,J＝16.8Hz,1H),2.48(dd,J＝16.8,9.6Hz,1H).

¹³C NMR(150MHz,CDCl₃):δ(ppm):196.5,168.3,164.1,148.0,140.7,135.8,131.2,130.7,126.8,126.4,119.6,118.5,117.8,114.1,58.4,55.5,52.1,38.1.

Compound 7:

2- (3-chlorobenzoyl) -2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(3-chloro-substituted benzoyl sulfide salt for synthetic substrate)

The yield of yellow solid was 94%.

¹H NMR(600MHz,CDCl₃):δ(ppm):7.92(s,1H),7.80(s,1H),7.77(d,J＝8.4Hz,1H),7.59(d,J＝6.6Hz,1H),7.45(t,J＝7.2Hz,1H),7.30(d,J＝6.6Hz,1H),7.18(t,J＝8.4Hz,1H),6.78-6.82(m,2H),5.65(brs,1H),4.63(d,J＝9.0Hz,1H),3.79(s,3H),3.54(d,J＝17.4Hz,1H),2.49(dd,J＝11.4,9.0,1H).

¹³C NMR(150MHz,CDCl₃):δ(ppm):197.0,168.1,147.6,140.7,135.8,135.7,135.3,133.8,130.8,130.2,128.8,126.8,126.1,119.7,118.9,117.9,58.9,52.2,37.7.

Compound 8:

2- (3-Bromobenzoyl) -2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(3-bromo-substituted benzoyl sulfide salt for synthetic substrate)

methyl

2-(3-bromobenzoyl)-2,3-dihydro-1H-benzo[b]azepine-4-carboxylate

The yield of yellow solid was 88%.

¹H NMR(600MHz,CDCl₃):δ(ppm):8.07(s,1H),7.81–7.79(m,2H),7.74(d,J＝9.0Hz,1H),7.38(t,J＝8.4Hz,1H),7.28(d,J＝7.8Hz,1H),7.17(t,J＝8.4Hz,1H),6.80(t,J＝8.4Hz,1H),6.77(d,J＝7.8Hz,1H),5.64(brs,1H),4.61(d,J＝8.4Hz,1H),3.79(s,3H),3.53(d,J＝18.6Hz,1H),2.48(dd,J＝17.4,9.0Hz,1H).

¹³C NMR(150MHz,CDCl₃):δ(ppm):196.9,168.0,147.6,140.7,136.7,135.85,135.77,131.7,130.8,130.4,127.2,126.1,123.3,119.6,118.8,117.9,58.9,52.1,37.6.

Compound 9:

2- (3-nitrobenzoyl) -2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(for synthetic substrate 3-nitro-substituted benzoyl sulfide salt)

The yield of yellow solid was 88%.

¹H NMR(600MHz,CDCl₃):δ(ppm):8.77(s,1H),8.48(d,J＝7.8Hz,1H),8.24(d,J＝7.2Hz,1H),7.81(s,1H),7.74(t,J＝7.8Hz,1H),7.31(d,J＝7.2Hz,1H),7.21–7.18(m,1H),6.84–6.79(m,2H),5.63(brs,1H),4.72(d,J＝9.0Hz,1H),3.78(s,3H),3.53(d,J＝16.8Hz,1H),2.52(dd,J＝12.0,9.0Hz,1H).

¹³C NMR(150MHz,CDCl₃) δ (ppm) 196.2,168.0,148.6,147.4,140.9,135.9,135.5,134.2,131.0,130.2,128.1,125.9,123.6,119.7,119.1,118.0,59.2,52.2,37.4. Compound 10:

2- (3-Methoxybenzoyl) -2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(the synthetic substrate was 3-methoxy-substituted benzoyl sulfide salt)

The yield of yellow solid was 81%.

¹H NMR(600MHz,CDCl₃):δ(ppm):7.80(s,1H),7.47–7.46(m,2H),7.40(t,J＝8.4Hz,1H),7.30(d,J＝7.2Hz,1H),7.18–7.16(m,2H),6.82–6.78(m,2H),5.69(brs,1H),4.65(d,J＝9.0Hz,1H),3.87(s,3H),3.78(s,3H),3.59(d,J＝16.8Hz,1H),2.49(dd,J＝11.4,9.6Hz,1H).

¹³C NMR(150MHz,CDCl₃):δ(ppm):198.1,168.2,160.0,147.9,140.7,135.8,135.5,130.7,129.9,126.4,121.3,120.3,119.7,118.7,117.9,113.2,58.9,55.5,52.1,38.0.

Compound 11:

2- (2-Fluorobenzoyl) -2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(for synthetic substrate, 2-fluoro-substituted benzoyl sulfide salt)

Yellow solid, yield 48%.

¹H NMR(600MHz,CDCl₃):δ(ppm):7.89(t,J＝7.8Hz,1H),7.76(s,1H),7.60–7.57(m,1H),7.30–7.27(m,2H),7.18–7.15(m,2H),6.81–6.77(m,2H),5.80(brs,1H),4.62(d,J＝9.0Hz,1H),3.77(s,3H),3.42(d,J＝16.8Hz,1H),2.55(dd,J＝17.4,7.2Hz,1H).

¹³C NMR(150MHz,CDCl₃):δ(ppm):196.2(J_C-F＝4.2Hz),168.0,161.1(J_C-F＝254.4Hz),147.8,140.4,135.8,135.4(J_C-F＝8.6Hz),131.2,130.7,126.2,124.9,123.2(J_C-F＝13.0Hz),119.8,118.7,117.7,116.8(J_C-F＝23.1Hz),62.3(J_C-F8.6Hz),52.0,36.7. compound 12:

2- (2-Fluorobenzoyl) -2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(for synthetic substrate, 2-fluoro-substituted benzoyl sulfide salt)

Yellow solid, yield 61%.

¹H NMR(600MHz,CDCl₃,50℃):δ(ppm):7.75(s,1H),7.47(d,J＝6.6Hz,1H),7.42(t,J＝6.6Hz,1H),7.32(d,J＝7.2Hz,1H),7.28–7.25(m,2H),7.18(d,J＝8.4Hz,1H),6.82–6.79(m,2H),5.75(brs,1H),4.61(d,J＝8.4Hz,1H),3.73(s,3H),3.31(s,1H),2.53(dd,J＝19.2,12.0Hz,1H),2.49(s,3H).

¹³C NMR(150MHz,CDCl₃,50℃):δ(ppm):201.5,168.1,148.0,140.4,138.8,135.8,135.2,132.2,131.8,130.7,128.1,126.2,125.8,120.0,118.9,117.8,60.3,52.0,36.7,20.9.

Compound 13:

2- (3, 4-Dichlorobenzoyl) -2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(synthetic substrate 3.4-dichloro-substituted benzoyl sulfide salt)

Yellow solid, yield 80%.

¹H NMR(600MHz,CDCl₃):δ(ppm):8.03(s,1H),7.80(s,1H),7.72(d,J＝8.4,1H),7.59(d,J＝7.8Hz,1H),7.29(d,J＝7.2Hz,1H),7.18(t,J＝8.4Hz,1H),6.81(t,J＝7.8Hz,1H),6.78(d,J＝7.8Hz,1H),5.61(brs,1H),4.59(d,J＝9.6Hz,1H),3.80(s,3H),3.52(d,J＝16.2Hz,1H),2.47(dd,J＝11.4,9.0Hz,1H).

¹³C NMR(150MHz,CDCl₃) δ (ppm) 196.1,168.0,147.5,140.8,138.6,135.8,133.8,133.6,131.0,130.9,130.7,127.7,126.0,119.6,118.9,117.9,59.0,52.2,37.6 compound 14:

2- (2-Naphthalylbenzoyl) -2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(for synthetic substrate, 2-naphthalene-substituted benzoyl sulfide salt)

Yellow solid, yield 87%.

¹H NMR(600MHz,CDCl₃):δ(ppm):8.45(s,1H),8.00–7.94(m,3H),7.90(d,J＝8.4Hz,1H),7.85(s,1H),7.64(t,J＝7.8Hz,1H),7.58(t,J＝7.2Hz,1H),7.33(d,J＝7.2Hz,1H),7.21–7.17(m,1H),6.84–6.80(m,2H),5.78(brs,1H),4.83(d,J＝9.0Hz,1H),3.77(s,3H),3.66(d,J＝17.4Hz,1H),2.55(dd,J＝12.0,9.6Hz,1H)

¹³C NMR(150MHz,CDCl₃):δ(ppm):198.1,168.2,147.9,140.7,135.8,132.4,131.4,130.8,129.7,129.0,128.8,127.8,127.1,126.5,124.1,119.8,118.7,117.9,58.9,52.1,38.1.

Compound 15:

2- (Furan-2-carbonyl) -2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(Synthesis of benzoyl sulfate with Furan substituted substrate)

Yellow solid, yield 80%.

¹H NMR(600MHz,CDCl₃):δ(ppm):7.78(s,1H),7.65(s,1H),7.35(s,1H),7.28(d,J＝7.8Hz,1H),7.16(t,J＝8.4Hz,1H),6.79(t,J＝8.4Hz,1H),6.76(d,J＝7.8Hz,1H),6.61–6.60(m,1H),5.58(brs,1H),4.47(d,J＝10.2Hz,1H),3.81(s,3H),3.66(d,J＝15.6Hz,1H),2.56(dd,J＝12.0,9.0Hz,1H).

¹³C NMR(150MHz,CDCl₃):δ(ppm):186.8,168.3,150.4,147.8,147.2,140.4,135.8,130.7,126.5,119.8,119.4,118.8,117.8,112.7,59.0,52.1,37.9.

Compound 16:

2- (thiophene-2-carbonyl) -2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(Synthesis of benzoyl sulfate with thiophene-substituted substrate)

Yellow solid, yield 79%.

¹H NMR(600MHz,CDCl₃):δ(ppm):7.80(s,1H),7.76(d,J＝5.4Hz,1H),7.74(d,J＝4.8Hz,1H),7.29(d,J＝7.2Hz,1H),7.19-7.15(m,2H),6.80(t,J＝8.4Hz,1H),6.77(d,J＝8.4Hz,1H),5.59(brs,1H),4.50(d,J＝9.0Hz,1H),3.81(s,3H),3.72(d,J＝16.8Hz,1H),2.60(dd,J＝11.4,9.0Hz,1H).

¹³C NMR(150MHz,CDCl₃):δ(ppm):190.8,168.2,147.5,140.6,135.8,134.9,133.3,130.73,128.5,126.3,119.6,118.7,117.9,59.8,52.1,38.9.

Compound 17:

2-benzoyl-7-fluoro-2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(the synthetic substrate was a 5-fluoro substituted MBH substrate)

Yellow solid, yield 56%.

¹H NMR(600MHz,CDCl₃):δ(ppm):7.92(d,J＝9.0Hz,2H),7.68(s,1H),7.63(t,J＝6.6Hz,1H),7.51(t,J＝8.4Hz,2H),7.00(dd,J＝9.6,3.6Hz,1H),6.91(t,J＝9.0Hz,1H),6.72(q,J＝4.6Hz,1H),5.60(s,1H),4.64(d,J＝12.6Hz,1H),3.78(s,3H),3.54(d,J＝17.4Hz,1H),2.52(dd,J＝12.0,9.6Hz,1H).

¹³C NMR(150MHz,CDCl₃):δ(ppm):198.2,168.0,156.0(J_C-F＝237.1Hz),144.5,139.1,134.1,134.0,128.9,128.8,128.1,120.7(J_C-F＝7.2Hz),120.2(J_C-F＝21.7Hz),119.0(J_C-F＝7.2Hz),118.0(J_C-F＝33.1Hz),58.9,52.2,38.1.

Compound 18:

2-benzoyl-7-chloro-2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(the synthetic substrate was a 5-chloro-substituted MBH substrate)

Yellow solid, yield 60%.

¹H NMR(600MHz,CDCl₃):δ(ppm):7.92(d,J＝7.8Hz,2H),7.68(s,1H),7.63(t,J＝7.2Hz,1H),7.51(t,J＝7.8Hz,2H),7.27(s,1H),7.10(d,J＝9.0Hz,1H),6.72(d,J＝8.4Hz,1H),5.74(brs,1H),4.63(d,J＝9.0Hz,1H),3.78(s,3H),3.59(d,J＝17.4Hz,1H),2.47(dd,J＝12.0,9.0Hz,1H).

¹³C NMR(150MHz,CDCl₃):δ(ppm):197.7,167.8,146.3,139.2,134.4,134.0,133.9,130.4,128.9,128.8,127.8,123.2,120.8,119.2,58.7,52.2,37.8.

Compound 19:

2-benzoyl-7-bromo-2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(the synthetic substrate was a 5-bromo substituted MBH substrate)

Yellow solid, yield 65%.

¹H NMR(600MHz,CDCl₃):δ(ppm):7.92(d,J＝7.2Hz,2H),7.68(s,1H),7.63(t,J＝7.8Hz,1H),7.51(t,J＝7.2Hz,2H),7.41(s,1H),7.22(d,J＝8.4Hz,1H),6.67(d,J＝7.8,1H),5.76(brs,1H),4.63(d,J＝7.2Hz,1H),3.78(s,3H),3.60(d,J＝17.4Hz,1H),2.46(dd,J＝11.4,9.0Hz,1H).

¹³C NMR(150MHz,CDCl₃):δ(ppm):197.7,167.8,146.7,139.1,137.4,134.1,133.9,133.1,129.0,128.9,128.86,127.8,121.3,119.6,110.1,58.7,52.23,37.8.

Compound 20:

2-benzoyl-7-methyl-2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(the synthetic substrate is a 5-methyl-substituted MBH substrate)

Yellow solid, yield 82%.

¹H NMR(600MHz,CDCl₃):δ(ppm):7.93(d,J＝7.8Hz,2H),7.77(s,1H),7.62(t,J＝7.2Hz,1H),7.51(t,J＝7.8Hz,2H),7.11(s,1H),7.00(d,J＝7.8Hz,1H),6.70(d,J＝8.4Hz,1H),5.57(brs,1H),4.65(d,J＝7.8Hz,1H),3.78(s,3H),3.55(d,J＝17.4Hz,1H),2.50(dd,J＝12.0,9.6Hz,1H),2.27(s,3H).

¹³C NMR(150MHz,CDCl₃):δ(ppm):198.4,168.2,145.8,140.6,135.7,134.2,133.8,131.8,128.9,128.8,127.9,126.3,119.8,117.9,59.0,52.1,38.0,20.1.

Compound 21:

2-benzoyl-6-chloro-2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(the synthetic substrate was a 6-chloro-substituted MBH substrate)

Yellow solid, yield 82%.

¹H NMR(600MHz,CDCl₃):δ(ppm):8.40(s,1H),7.94(d,J＝8.4Hz,2H),7.63(t,J＝7.2Hz,1H),7.51(t,J＝8.4Hz,2H),7.06(t,J＝8.4Hz,1H),6.92(d,J＝7.2Hz,1H),6.71(d,J＝7.8Hz,1H),5.79(brs,1H),4.72(d,J＝9.6Hz,1H),3.81(s,3H),3.49(d,J＝17.4Hz,1H),2.53(dd,J＝12.6,9.6Hz,1H).

¹³C NMR(150MHz,CDCl₃):δ(ppm):198.0,168.1,150.2,137.8,134.9,134.0,133.9,130.5,128.93,128.86,128.5,120.4,118.0,117.2,60.1,52.3,37.4.

Compound 22:

2-benzoyl-6-methoxy-2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(the synthetic substrate was a 6-methoxy-substituted MBH substrate)

Yellow solid, yield 68%.

¹H NMR(600MHz,CDCl₃):δ(ppm):8.40(s,1H),7.93(s,1H),7.91(s,1H),7.60(t,J＝7.8Hz,1H),7.49(t,J＝8.4Hz,2H),7.10(t,J＝8.4Hz,1H),6.40(d,J＝8.4Hz,1H),6.32(d,J＝7.8Hz,1H),5.70(brs,1H),4.72(d,J＝8.4Hz,1H),3.88(s,3H),3.77(s,3H),3.49(d,J＝16.8Hz,1H),2.53(dd,J＝12.6,9.6Hz,1H)

¹³C NMR(150MHz,CDCl₃):δ(ppm):198.4,168.7,159.9,150.0,134.1,133.9,132.6,131.2,128.9,128.8,125.8,110.8,109.9,100.4,59.8,55.9,52.0,37.9.

Compound 23:

2-benzoyl-8, 9-dimethyl-2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid methyl ester

(the synthetic substrate was a 3.4 dimethyl-substituted MBH substrate)

Yellow solid, yield 85%.

¹H NMR(600MHz,CDCl₃):δ(ppm):7.94(d,J＝7.2Hz,2H),7.80(s,1H),7.62(t,J＝6.6Hz,1H),7.51(t,J＝7.2Hz,2H),7.11(d,J＝7.8Hz,1H),6.68(d,J＝7.8Hz,1H),5.90(brs,1H),4.67(d,J＝9.6Hz,1H),3.78(s,3H),3.55(d,J＝16.2Hz,1H),2.53(dd,J＝11.4,9.6Hz,1H),2.31(s,3H),2.19(s,3H)

¹³C NMR(150MHz,CDCl₃):δ(ppm):198.9,168.4,146.5,141.1,139.2,134.1,133.9,133.3,128.9,128.8,125.0,122.1,121.0,118.0,59.0,52.0,38.4,21.1,13.0.

Compound 24:

2-benzoyl-2, 3-dihydro-1H-benzo [ b ] aza-4-carboxylic acid ethyl ester

(the synthetic substrate was an ethyl ester-substituted MBH substrate)

Yellow solid, yield 93%.

¹H NMR(600MHz,CDCl₃):δ(ppm):7.93(d,J＝7.2Hz,2H),7.79(s,1H),7.61(t,J＝6.6Hz,1H),7.50(t,J＝7.8Hz,2H),7.30(d,J＝8.4Hz,1H),7.16(t,J＝6.6Hz,1H),6.81–6.77(m,2H),5.71(brs,1H),4.67(d,J＝9.6Hz,1H),4.23(q,J＝7.8Hz,2H),3.59(d,J＝16.8Hz,1H),2.48(dd,J＝10.8,9.0Hz,1H),1.30(t,J＝7.2Hz,3H).

¹³C NMR(150MHz,CDCl₃):δ(ppm):198.1,167.7,147.84,140.4,135.7,134.0,133.9,130.7,128.9,128.8,126.7,119.8,118.6,117.8,60.9,58.8,37.9,14.4.

Testing the bacteriostatic activity of the benzazepine seven-membered ring compound:

1. purpose of the experiment:

the MIC values of test compounds (compound 11) against clinically isolated pathogenic bacteria (including methicillin-resistant Staphylococcus aureus (MRSA), methicillin-sensitive Staphylococcus aureus (MSSA), methicillin-resistant Staphylococcus epidermidis (MRSE), methicillin-sensitive Staphylococcus epidermidis (MSSE) gram-positive bacteria, and gram-negative bacteria such as Klebsiella pneumoniae (ESBLs +), Klebsiella pneumoniae (ESBLs-), Escherichia coli (ESBLs +), Escherichia coli (ESBLs-) and the like, each of about 4 strains, in total about 36 strains, collected in hospitals in the region of 2-3 years are determined by agar plate double dilution method.

2. The experimental basis is as follows:

the determination of the Minimum Inhibitory Concentration (MIC) was performed by the agar double dilution method recommended by the national clinical Laboratory Standards Institute CLSI.

3. The experimental method comprises the following steps:

adding 1ml of the test solution into a sterile plate, adding 14ml of the melted 50 ℃ MHA culture medium, and uniformly mixing to ensure that the final concentration of the drugs in each plate is in turn128, 64, 32, 16, 8, 4, 2,1, 0.5,. mu.g/ml; cooling, inoculating bacteria with a multi-point inoculating instrument with an inoculation amount of about 10⁴CFU/ml, cover the dish lid, put in the incubator, 36 + -1 deg.C, incubate for 20-24 h. And after the culture is finished, carrying out visual observation, wherein the lowest sample concentration in which no bacteria grow in the plate is the Minimum Inhibitory Concentration (MIC). Meanwhile, a blank bacteria control without any sample is set.

4. The experimental results are as follows: compound 11 had a MIC of 2ug/ml against methicillin-sensitive Staphylococcus aureus (MSSE). Showing activity thereto.

The compound prepared by the invention can effectively inhibit methicillin-sensitive staphylococcus epidermidis and has good antibacterial activity. The antibacterial effect is also achieved for other compounds, the experimental method and the final effect are the same, and in order to reduce repeated contents, the experimental contents of other compounds are not listed one by one.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.