The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 14, 2020
Filed:
Jan. 25, 2017
Zhejiang Huahai Pharmaceutical Co., Ltd., Zhejiang, CN;
Shanghai Aobo Pharmtech, Inc., Ltd., Shanghai, CN;
Jianping Lin, Shanghai, CN;
Xiaowen Guo, Shanghai, CN;
Xiaofei Gao, Shanghai, CN;
Chao Huang, Shanghai, CN;
Yuanbing Guo, Shanghai, CN;
Anping Tao, Shanghai, CN;
Luning Huang, Shanghai, CN;
Hong Gu, Shanghai, CN;
Zhejiang Huahai Pharmaceutical Co., Ltd., Zhejiang, CN;
Shanghai Aobo Pharmtech, Inc., Ltd., Shanghai, CN;
Abstract
The present invention relates to a synthesis process of suvorexant, novel compounds represented by formulas II, III, IV or V, or salts thereof for preparing suvorexant, and a method for preparing the intermediates. The preparation method uses a chiral starting material to synthesize chiral compounds represented by formulas II, III, IV or V, the compounds obtained being used for synthesizing the suvorexant. The preparation method has the advantages of simple operation, low cost, mild reaction conditions, simple post-treatment, easy to purify, high yield, high ee value for the product, and easy to industrialize. In the reaction route shown, R represents benzyl, allyl or 1-phenethyl, or optionally substituted benzyl at the 2 position to 6 position, such as 4-methoxybenzyl, 4-nitrobenzyl, 2-methylbenzyl, 4-chlorobenzyl or 3-fluorobenzyl.