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Preparation of chiral covalent organic framework material having L-menthol as chiral source

A covalent organic framework, menthol technology, applied in other chemical processes, chemical instruments and methods, etc., can solve problems such as environmental pollution, and achieve the effect of high efficiency and low energy consumption

Active Publication Date: 2019-01-04
QIQIHAR UNIVERSITY
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Problems solved by technology

However, natural chiral substances are rare in nature. Existing technologies and traditional techniques are likely to cause serious pollution to the environment. Therefore, the preparation of a new type of porous material that can be used for chiral resolution has important scientific significance. and research value

Method used

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  • Preparation of chiral covalent organic framework material having L-menthol as chiral source
  • Preparation of chiral covalent organic framework material having L-menthol as chiral source

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Embodiment Construction

[0015] In order to make the objects and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with examples. It should be understood that the specific examples described here are only used to explain the present invention, not to limit the present invention.

[0016] The concrete implementation of the present invention is as follows: take L-menthol as the preparation method of the chiral covalent organic skeleton of chiral source, the steps of described method are as follows:

[0017] (1) Under nitrogen protection, inject thionyl chloride (13.5mL) into a three-necked bottle filled with 2,5-dibromobenzoic acid (3.00g, 9.26mmol), heat to 75°C in an oil bath and stir to react After 4 hours, the compound obtained by rotary evaporation was 2,5-dibenzoyl chloride;

[0018] (2) Under nitrogen protection, inject L-menthol (2.89g, 18.5mmol) into a three-necked bottle filled with 2,5-dibromobenzoyl chloride (1.69g, 8...

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Abstract

The invention discloses a preparation method of a hyperbranched polymer having (s)-(-)-alpha-phenethylamine as a chiral source. Thionyl chloride, 3,5-dibromobenzoic acid and (S)-(-)-alpha-phenethylamine are subjected as materials to two-step organic synthetic reaction to obtain white needle crystal A; 1,3,5-tribromophenyl, Pd(PPh3)2Cl2, CuI, PPh3 and ethynyl trimethylsilane are subjected as raw materials to two-step reaction to synthesize compound B; the white needle crystal A, the compound B, Pd(PPh3)2Cl2, PPh3 and CuI are subjected as materials to heating via a microwave reactor by using triethylamine and dimethylformamide as solvents, and stirring is carried out for 17 min; the crude product is purified and dried to obtain yellow solid; the finished product is tested. The novel nano-level hyperbranched polymer herein can provide massive catalytic active sites containing chiral groups in asymmetric catalytic reaction, and asymmetric synthetic reactive catalytic efficiency is improved.

Description

technical field [0001] The invention belongs to the field of polymer materials and engineering, and in particular relates to a preparation method of a chiral covalent organic framework using L-menthol as a chiral source. Background technique [0002] Chiral resolution is of great significance, and isomers with different optical activity often have significant differences in their properties. However, natural chiral substances are rare in nature. Existing technologies and traditional techniques are likely to cause serious pollution to the environment. Therefore, the preparation of a new type of porous material that can be used for chiral resolution has important scientific significance. and research value. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing a covalent organic framework with L-menthol as a chiral source, which contains a chiral structure and has a unique tubular shape. The polymer can be used for chir...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J20/22
CPCB01J20/226C08G83/008
Inventor 徐亮藏雨荆博宇雷天阳吴云峰黄媛贾宏葛
Owner QIQIHAR UNIVERSITY
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