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Preparation method and application of suvorexant intermediate

An intermediate and reaction technology, which is applied in the field of preparation of Suwo Leisheng intermediates, can solve the problems of harsh reaction conditions, high risk factor, and difficulty in industrialization, and achieve the effect of mild reaction conditions, high safety factor, and easy control

Pending Publication Date: 2021-03-30
TIANJIN PHARMA GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some documents, such as: US2008 / 132490, Org.Process Res.Dev.2011, 15:367-375, WO2012148553, J.Am.Chem.Soc.2011, 133:8362-8371, Org.Lett., 2012 , 14(13):3458-3461, Angew.Chem.Int.Ed.2011, 50, 11511-11515, J.Med.Chem., 2010, 14(53):5320-5332, Chin.Chem.Lett, 2015, 1(26): 103-107, Tetrahedron Lett, 2014, 42(55): 5778-5780, etc. During the preparation process, in order to obtain the intermediate seven-membered nitrogen-containing chiral heterocycle, chiral raw materials were used in some reactions Preparation, high cost; some reactions use highly toxic compound methyl vinyl ketone to construct; some reactions use a large amount of strong base and strong acid, resulting in excessive waste acid and waste alkali; some reactions have too high temperature , the reaction conditions are harsh, the risk factor is high, and it is not easy to realize industrialization

Method used

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  • Preparation method and application of suvorexant intermediate
  • Preparation method and application of suvorexant intermediate
  • Preparation method and application of suvorexant intermediate

Examples

Experimental program
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Embodiment 1

[0073] The preparation of embodiment 1 formula I compound

Embodiment 1-1

[0075]

Embodiment 1-1a

[0077] Add 16.0 g of N-tert-butoxycarbonyl-1,2-ethylenediamine and 14.0 mL of triethylamine into 200 mL of dichloromethane, slowly add 11.8 g of acetyl chloride dropwise, the reaction at room temperature is completed, and TLC until no N-tert Butoxycarbonyl-1,2-ethylenediamine. Water was added to quench the reaction, and the organic phase was separated, washed with water, dried, and filtered to obtain the organic phase, which was concentrated to dryness to obtain 19.1 g of the compound of formula I as a yellow liquid, with a yield of 94.6% and an HPLC purity of 97.8%.

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Abstract

The invention provides a preparation method and application of a suvorexant intermediate, and relates to the technical field of chemical synthesis. The preparation method of the suvorexant intermediate comprises the following step: (e) reacting a compound as shown in a formula IV under the action of a Grubbs catalyst to obtain a compound as shown in a formula V. The Grubbs catalyst (Grubbs second-generation catalyst) is creatively used for construction of the suvorexant intermediate seven-membered nitrogen-containing chiral heterocycle, an inflammable and highly toxic compound methyl vinyl ketone is not needed, inflammable and explosive toxic gas is not needed, reaction is not needed under the conditions of strong acid, strong alkali and high temperature, generation of a large amount of acid liquor and alkali liquor and high-temperature operation can be avoided, the method is mild in reaction condition, environment-friendly, high in safety coefficient and easy to industrialize.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis, in particular to a preparation method and application of a Suvoryxan intermediate. Background technique [0002] Insomnia is the most common sleep disorder, about 30-50% of adults have shown symptoms of insomnia, of which 10-15% have been diagnosed with insomnia. Although insomnia is related to many serious physical and mental diseases, people's attention to him is far from enough. For a long time, insomnia is only defined as a symptom of other diseases, so there is little progress in understanding and treating it. . [0003] At present, the drugs for clinical treatment of insomnia mainly include benzodiazepine receptor agonists, melatonin receptor agonists and antidepressants with hypnotic effect, but the main purpose of most of them is not to treat insomnia, but to act as a sedative . Orexin is a neuropeptide produced by neurons in the hypothalamus, which plays an important role i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D403/10C07D413/14
CPCC07D403/10C07D413/14C07B2200/07
Inventor 李强张静丁丽
Owner TIANJIN PHARMA GROUP CORP
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