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Simple synthetic process of antidepressant medicine imipramine hydrochloride intermediate

A technique for the synthesis of imipramine hydrochloride, which is applied in organic chemistry and other fields, can solve the problems of expensive raw materials, few synthesis reports, difficult preparation and industrialization, and achieve the effects of easy-to-obtain raw materials, simple synthesis process, and convenient operation

Inactive Publication Date: 2019-04-19
南京诺希生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are not many reports about the synthesis of N-Boc-3-azepanone at home and abroad, and the raw materials are expensive and difficult to prepare and industrialize

Method used

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  • Simple synthetic process of antidepressant medicine imipramine hydrochloride intermediate
  • Simple synthetic process of antidepressant medicine imipramine hydrochloride intermediate
  • Simple synthetic process of antidepressant medicine imipramine hydrochloride intermediate

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Embodiment Construction

[0014] The present invention will be further illustrated below in conjunction with specific embodiments, and it should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0015] The present invention boldly innovates on the basis of existing related techniques, and develops a technique with simple and easy raw materials and simple and convenient operation.

[0016] Its synthetic reaction formula is as follows:

[0017]

[0018] The specific steps are:

[0019] first step

[0020] Take 115g of 6-amino-2-hexanone, 240g of BOC anhydride, and 1000ml of DCM, put them into a 2L reaction flask, stir and react at room temperature 15-25°C overnight, about 16h; GC, until the raw materials are completely reacted. The concentrated solution obtained is directly thrown into the next step.

[0021] second step

[0022] Add 1g of AIBN and 196g of NBS to the concentrat...

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Abstract

The invention discloses a simple synthetic process of an antidepressant medicine imipramine hydrochloride intermediate. The simple synthetic process includes the following steps: (1) putting 6-amino-2-hexanone, BOC anhydride and DCM into a reaction bottle, and stirring the mixture at a room temperature until the raw materials completely react to form a concentrate; (2) adding AIBN and NBS into theconcentrate, heating the AIBN, NBS and concentrate to reflux, keeping the temperature until the reaction is complete, filtering, leaching a filter cake once with DCM, collecting a filtrate, washing the filtrate one with brine, drying the filtrate with anhydrous sodium sulfate, and reducing the pressure for condensation until the filtrate is dry so as to obtain a crude product; and (3) putting thecrude product into tetrahydrofuran, reducing the temperature to a room temperature, adding 60% sodium hydride soaked and washed twice with methyl tertiary ether into a reaction solution in batches, keeping the temperature until the reaction is complete, pouring the mixture into ice water for extraction twice with methyl tertiary ether, combining organic phases, washing the organic phases with brine, drying the organic phases with anhydrous sodium sulfate, increasing the pressure for condensation, and reducing the pressure for rectification to obtain the final product with the purity being 98.5% and the total yield of the three steps being 61.5%. The synthetic process has the advantages of easily available raw materials, convenient operation and high yield.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and in particular relates to a simple synthesis process of an antidepressant drug imipramine hydrochloride intermediate. Background technique [0002] Imipramine hydrochloride is a strong antidepressant drug, which also has sedative and anti-schizophrenia properties, and can also be used to treat enuresis in children. In the synthesis of imipramine hydrochloride, N-Boc-3-azepanone, as an important intermediate, plays a key role in the quality and price of raw materials. At present, there are not many reports on the synthesis of N-Boc-3-azepanone at home and abroad, and the raw materials are expensive and difficult to prepare and industrialize. Contents of the invention [0003] In order to solve the above problems, the invention discloses a simple synthesis process of an antidepressant drug imipramine hydrochloride intermediate, the raw materials are simple and easy to obtain, the op...

Claims

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Application Information

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IPC IPC(8): C07D223/08
CPCC07D223/08
Inventor 赵小林崔家乙郭鑫崔松锐伍有本任勇杰
Owner 南京诺希生物科技有限公司
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