申请人:Guangdong Raffles Pharmatech Co., Ltd
公开号:EP3904333A1
公开(公告)日:2021-11-03
The present disclosure relates to a method for preparing (2S,3S)-3-amino-bicyclo[2.2.2]octane-2-carboxylate; it belongs to the field of pharmaceutical intermediate synthesis. The purpose of the present disclosure is to solve the problems of high preparation cost and low material safety of (2S,3S)-3-amino-bicyclo[2.2.2]octane-2-carboxylate, to further increase the production capacity and to reduce the production cost. The method of the present invention takes 3-carbonyl-bicyclo[2.2.2]octane-2-carboxylate as the starting material and performs reductive amination, alkalinity configuration flip, and hydrogenation to remove the protecting group in sequence to obtain the target product. The synthesis of (2S,3S)-3-amino-bicyclo[2.2.2]octane-2-carboxylate according the present invention is characterized by a novel route, mild reaction conditions and low cost, with a yield of more than 65%.
本发明涉及一种(2S,3S)-3-氨基双环[2.2.2]辛烷-2-羧酸盐的制备方法,属于医药中间体合成领域。本发明的目的在于解决(2S,3S)-3-氨基双环[2.2.2]辛烷-2-羧酸酯制备成本高、原料安全性低的问题,进一步提高生产能力,降低生产成本。本发明的方法以 3-羰基-双环[2.2.2]辛烷-2-羧酸酯为起始原料,依次进行还原胺化、碱度配置翻转、氢化脱去保护基,得到目标产物。根据本发明合成(2S,3S)-3-氨基双环[2.2.2]辛烷-2-羧酸酯的方法具有路线新颖、反应条件温和、成本低廉等特点,收率超过 65%。