Preparation method of quinoline derivative
阅读说明：本技术 一种喹啉衍生物的制备方法 (Preparation method of quinoline derivative ) 是由 王峰 张超锋 任濮宁 高著衍 于 2018-07-27 设计创作，主要内容包括：本发明涉及一种喹啉衍生物的制备方法。该方法以芳香胺类化合物和脂肪醇为原料,以含氧二硫化钼为催化剂,在惰性气氛或者在含氧的气氛、120～200℃条件下反应2～12h,反应完成后,分离液相成分,浓缩,经硅胶柱分离,得到取代喹啉化合物。该合成方法在喹啉化合物合成方面可能有重要的应用。(The invention relates to a preparation method of a quinoline derivative. The method comprises the steps of taking aromatic amine compounds and aliphatic alcohol as raw materials, taking oxygen-containing molybdenum disulfide as a catalyst, reacting for 2-12 hours in an inert atmosphere or an oxygen-containing atmosphere at 120-200 ℃, separating liquid phase components after the reaction is finished, concentrating, and separating through a silica gel column to obtain the substituted quinoline compound. The synthesis method can be applied to the synthesis of quinoline compounds.)
1. A preparation method of quinoline derivatives is characterized in that: taking an aromatic amine compound and aliphatic alcohol as raw materials, taking molybdenum disulfide containing oxygen as a catalyst, reacting for 1-24 h in an inert atmosphere or an oxygen-containing atmosphere at 100-220 ℃, separating liquid phase components after the reaction is finished, concentrating, and separating by a silica gel column to obtain the substituted quinoline compound.
2. The method of claim 1, wherein:
the aromatic nitro compound is one or more than two of the following structures:
(1) nitrobenzene and nitrobenzene substituent Rx-(C6H5-X)-NO2(x is 1 to 5), wherein R represents different substituentsSubstituent (R ═ H, F, Cl, Br, I, CH)3，OCH3，NH2，NO2One to five of CHO, Ph, etc.), X represents the number of substituents, when X represents the number of substituents>1, R may represent the same substituent or different substituents;
(2) the compound of aromatic condensed ring H is substituted by mononitro, wherein the aromatic condensed ring can be one or two of naphthalene ring and anthracene ring;
(3) the compound of the aromatic heterocyclic ring H substituted by the mononitro group, wherein the aromatic heterocyclic ring can be one or more of a pyridine ring, a thiophene ring, a furan ring and an imidazole ring.
3. The method of claim 1, wherein: the fatty alcohol is used as a solvent and a reactant at the same time; the aliphatic alcohol is H (CH)2)nCH2CH3One or more of OH (0. ltoreq. n.ltoreq.6, preferably 0. ltoreq. n.ltoreq.2).
4. The method of claim 1, wherein: the catalyst containing oxygen molybdenum disulfide is MoS2-xOy0.001. ltoreq. x.ltoreq.0.4 and 0.001. ltoreq. y.ltoreq.0.2, preferably 0.002. ltoreq. x.ltoreq.0.1 and 0.002. ltoreq. y.ltoreq.0.1, in the catalyst.
5. The method of claim 1, wherein: the aliphatic alcohol in claim 3 is used as a substrate and a reaction solvent at the same time, the concentration of the aromatic amine compound substrate is 0.001-5 mol/L, the dosage of the catalyst is 0.5-40 w% of the mass of the aromatic amine compound substrate, the reaction temperature is 100-220 ℃, and the reaction time is 1-24 h.
6. The method of claim 1, wherein: the aliphatic alcohol in claim 3 is used as a substrate and a reaction solvent at the same time, the concentration of the aromatic amine compound substrate is 0.05-2 mol/L, the dosage of the catalyst is 0.5-20 w% of the mass of the aromatic amine compound substrate, the reaction temperature is 120-200 ℃, and the reaction time is 2-12 h.
7. The method of claim 1, wherein: the reaction atmosphere may be a pure inert atmosphere, preferably N2Ar or the mixed gas of the Ar and the Ar, wherein the pressure is 0.1-3 MPa; or the reaction is carried out in an oxygen-containing atmosphere, preferably air or O2The pressure of the atmosphere or the mixed gas of the atmosphere and the mixed gas is 0.1-1 MPa.
8. The method of claim 1, wherein: the aromatic nitro compound is preferably nitrobenzene and nitrobenzene substituent Rx-(C6H5-X)-NO2(x＝1～2)。
Technical Field
The invention belongs to the technical field of organic synthesis, and particularly relates to a preparation method of a quinoline derivative.
Background
Quinolines and their derivatives are an important class of organic compounds, which are widely used in the synthesis of functional drugs, pesticides, dyes, chemical agents, optical materials, functional polymers, and the like (Andries K et al science.2005; 307(5707): 223-27; Theraladanon C et al tetrahedron: asymmetry.2005; 16(4): 827-31; Roma G et al European Journal of medical chemistry.2000; 35(11): 1021-35; Zhang X J et al macromolecules.1999; 32(22): 7422-29). The synthesis method has been widely noticed, among which Skraup reaction (Organic reactions.1953; 7:59-98), Doebner reaction (J.chem.Soc.1934:1520-23), Doebner-Von MThe iller reaction (Berichtedder deutschen chemischen Gesellschaft.1883; 6(2):2464-72), the Combes reaction (J.chem.Soc.1927:1832-57), the Conrad-Limpach reaction (chem.Rev.1942; 30(1):113-44),
Regarding the conversion of fatty alcohol to generate the key carbonyl compound (5), fatty alcohol can generate aldehyde ketone under a dehydrogenation catalytic system and can also generate aldehyde ketone under an oxidation system, but the main problem at present is that the generated aldehyde or ketone intermediate is easier to react with aniline compound to generate imine compound, the imine compound can be further reduced to substituted amine (by-product 2), and meanwhile, in order to oxidize fatty alcohol, the oxidation performance of the oxidation system is usually too strong to easily oxidize substrate aniline compound, so that the reaction selectivity and the yield of quinoline derivative are low. By analysis, it is a challenging task to develop a method for selectively synthesizing quinoline compounds by using a cheap, easily available and stable non-noble metal heterogeneous catalyst.
The invention relates to a preparation method of a quinoline derivative. The method comprises the steps of taking aromatic amine compounds and aliphatic alcohol as raw materials, taking oxygen-containing molybdenum disulfide as a catalyst, reacting for 2-12 hours in an inert atmosphere or an oxygen-containing atmosphere at 120-200 ℃, separating liquid phase components after the reaction is finished, concentrating, and separating through a silica gel column to obtain the substituted quinoline compound. The synthesis method can be applied to the synthesis of quinoline compounds.
Disclosure of Invention
The invention relates to a preparation method of a quinoline derivative. The method comprises the steps of taking aromatic amine compounds and aliphatic alcohol as raw materials, taking oxygen-containing molybdenum disulfide as a catalyst, reacting for 2-12 hours in an inert atmosphere or an oxygen-containing atmosphere at 120-200 ℃, separating liquid phase components after the reaction is finished, concentrating, and separating through a silica gel column to obtain the substituted quinoline compound. The synthesis method can be applied to the synthesis of quinoline compounds.
For the aromatic amine compound, the aromatic amine compound is: (1) anilines and aniline substitutes Rx-(C6H5-X)-NH2(x ═ 1 to 5), wherein R represents various substituents (R ═ H, F, Cl, Br, I, CH3，OCH3，NH2，NO2CHO, Ph, etc.), X represents the number of substituents. When X is present>1 is the same substituent that R may represent or different substituents; (2) aromatic amine compounds with benzene rings substituted by other aromatic condensed rings, wherein the other aromatic condensed rings can be one or more of naphthalene rings, anthracene rings and the like; (3) the aromatic amine compound with the benzene ring substituted by the aromatic heterocyclic ring can be one or more of a pyridine ring, a thiophene ring, a furan ring, an imidazole ring and the like.
For fatty alcohols, it acts as both a solvent and a reactant in the process. The aliphatic alcohol is H (CH)2)nCH2CH3One or more of OH (n is more than or equal to 0 and less than or equal to 6). When n is>2 is, in addition to a linear alkane substituent, a substituent having a branch.
The catalyst containing molybdenum disulfide oxide is MoS2-XOyBy controlling the sulfuration and reduction degree of the molybdate precursor, x is more than or equal to 0 and less than or equal to 0.4 and y is more than or equal to 0 and less than or equal to 0.2 in the obtained catalyst. Regarding the preparation method of the molybdenum sulfide catalyst: ammonium molybdate and sodium molybdate are taken as precursors, thiourea and sodium sulfide are taken as sulfur sources according to n(Mo):n(S)Dispersing the catalyst in an aqueous solution at a ratio of 1: 3-1: 30, carrying out hydrothermal treatment at 160-240 ℃ for 6-72 h, filtering and washing to obtain the catalyst. Wherein, the effect of taking ammonium molybdate as a precursor is better than that of sodium molybdate, thiourea in the sulfur source is cheap and easy to control and decompose, and is more suitable in the process of preparing molybdenum sulfide materials, and the synthesis of the catalyst is optimized: according to n(Mo):n(S)Feeding the materials at a ratio of 1: 6-1: 30The hydrothermal treatment is preferably carried out at 160-220 ℃ for 12-48 h.
According to specific synthesis conditions, the aliphatic alcohol is used as a substrate and a reaction solvent at the same time, the concentration of the aromatic amine compound substrate is 0.001-5 mol/L, the dosage of the catalyst is 0.5-40 w% of the mass of the aromatic amine compound substrate, the reaction temperature is 100-220 ℃, and the reaction time is 1-24 h. The optimized conditions are that the concentration of the aromatic amine compound substrate is 0.05-2 mol/L, the dosage of the catalyst is 0.5-20 w% of the mass of the aromatic amine compound substrate, the reaction temperature is 120-200 ℃, and the reaction time is 2-12 h.
The reaction atmosphere may be a pure inert atmosphere, N, depending on the specific synthesis conditions2Ar or the mixed gas of the Ar and the Ar, wherein the pressure is 0.1-3 MPa; or the reaction is carried out in an oxygen-containing atmosphere, air or O2The atmosphere is under a pressure of 0.1 to 1 MPa.
The invention belongs to the technical field of organic synthesis, and particularly relates to a method for preparing a quinoline compound through oxidation-reduction integration.
Drawings
FIG. 1 is a possible mechanism for the reaction of aniline with fatty alcohols to produce quinine compounds;
FIG. 2 commercial MoS2 (Black 2H-MoS)2) And MoS2-xOy(180-24h) (Red O-MoS)2) Raman mapping of (a). Contrast display MoS2-xOy(180-24h) obvious crystal lattice oxygen residue or doping.
FIG. 3 MoS2-xOy(180-24h) EDX elemental analysis, the catalyst after analysis being expressed in MoS form1.73O0.1(180-24h)。
Detailed Description
In order to further explain the present invention in detail, several specific embodiments are given below, but the present invention is not limited to these embodiments.
First, for the convenience of expressing the catalyst used, the relevant catalyst will be described. MoSxThe base catalyst is synthesized hydrothermally. Commercial ammonium molybdate and thiourea according to n(Mo):n(S)The mixture was added to a 150mL stainless steel autoclave lined with tetrafluoro at 1:3 to 1:30, and 90mL deionized water was added with stirring. And then the sealed stainless steel autoclave is placed in an oven at 160-250 ℃ for treatment for 12-48 h. After the treatment is finished, the reaction kettle is naturally cooled to room temperature, and the black solid is washed by deionized water and absolute ethyl alcohol. The catalyst obtained was named MoS2-xOy(m-nh), wherein m represents the temperature of the treatment and n represents the time of the treatment. In order to verify whether the catalyst contains lattice oxygen residues or incorporation, the resulting catalyst was first characterized using Raman spectroscopy, followed by characterization of the oxygen content in the catalyst using EDX electron microscopy characterization techniques. MoS2-xOy(m-n h), the correlation results are plotted for the x and y parameters of the catalyst. In MoS2-xOy(180-24h), the Raman spectrum of the sample is shown in figure 2, and the element distribution diagram of the sample is shown in figure 3.
Reaction equation for quinoline synthesis:
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