NOVEL CRYSTALLINE ARYLALKYLAMINE COMPOUND AND PROCESS FOR PRODUCING THE SAME
申请人:MITSUBISHI TANABE PHARMA CORPORATION
公开号:US20160200679A1
公开(公告)日:2016-07-14
The present invention provides novel crystal forms of arylalkylamine compounds. Specifically, the novel crystal forms of 4-(3S-(1R-(1-naphthyl)ethylamino)pyrrolidin-1-yl)phenylacetic acid have excellent stability and therefore are useful as pharmaceutical ingredients. The present invention also provides industrially advantageous processes for producing the arylalkylamine compounds.
NOVEL CRYSTALLINE ARYLALKYLAMINE COMPOUND AND METHOD FOR PRODUCING SAME
申请人:Mitsubishi Tanabe Pharma Corporation
公开号:EP3042893A1
公开(公告)日:2016-07-13
The present invention provides novel crystal forms of arylalkylamine compounds. Specifically, the novel crystal forms of
4-(3S-(1R-(1-naphthyl)ethylamino)pyrrolidin-1-yl)phenylacetic acid have excellent stability and therefore are useful as pharmaceutical ingredients. The present invention also provides industrially advantageous processes for producing the arylalkylamine compounds.
Careful examination of nucleophilicity, basicity, and leaving group ability led us to discover the nucleophilic fluorination of triflates by weakly basic tetrabutylammonium bifluoride, which provides excellent yields with minimal formation of elimination-derived side products. Primary hydroxyl groups as well as secondary hydroxyl groups in acyclic chains or in five-membered rings are excellent substrates, whereas benzylic and aldol-type secondary hydroxyl groups give poor yields as a result of the instability of their triflates.