[EN] PROCESS FOR THE PREPARATION OF OPTICALLY ACTIVE COMPOUNDS USING PRESSURE HYDROGENATION [FR] PROCÉDÉ DE PRÉPARATION DE COMPOSÉS OPTIQUEMENT ACTIFS PAR HYDROGÉNATION SOUS PRESSION
Industrial Scale-Up of Enantioselective Hydrogenation for the Asymmetric Synthesis of Rivastigmine
作者:Pu-Cha Yan、Guo-Liang Zhu、Jian-Hua Xie、Xiang-Dong Zhang、Qi-Lin Zhou、Yuan-Qiang Li、Wen-He Shen、Da-Qing Che
DOI:10.1021/op3003147
日期:2013.2.15
Two efficient processes for the synthesis of rivastigmine, one of the most potent drugs for the treatment of mild-to-moderate dementia of the type presenting in Alzheimer's disease, has been developed. Of particular note is the processes used for the asymmetric hydrogenation by applying the highly efficient chiral spiro catalyst, Ir-SpiroPAP. The first route was easy to scale up in industry and provided the commercial intermediate (S)-3-(1-dimethylaminoethyl)phenol, 6, which is suitable for the manufacture of rivastigmine in active pharmaceutical ingredient (API) demand. The second route was convenient for operation and purification and completed the synthesis of rivastigmine (1) in four steps and 84% overall yield.
Process for Preparation of Optically Active Compounds using Transfer Hydrogenation
申请人:Novartis AG
公开号:US20130096337A1
公开(公告)日:2013-04-18
A catalytic process for the preparation of optically active compounds and their conversion thereafter to desired drug substances. In particular, the process relates to the preparation of (S)-3-(1-Dimethylamino-ethyl)-phenol using asymmetric catalytic reduction and transfer hydrogenation, thereby providing an improved route to forming drug substances such as rivastigimine and rivastigimine hydrogen tartrate.