[EN] PROCESSES FOR THE PREPARATION OF HIGHLY PURE PRUCALOPRIDE SUCCINATE AND ITS INTERMEDIATES<br/>[FR] PROCÉDÉS POUR LA PRÉPARATION DE SUCCINATE DE PRUCALOPRIDE TRÈS PUR ET DE SES INTERMÉDIAIRES
申请人:SYMED LABS LTD
公开号:WO2017137910A1
公开(公告)日:2017-08-17
Provided herein are purification processes for the preparation of highly pure prucalopride succinate salt. Provided also herein are improved, commercially viable and industrially advantageous processes for the preparation of Prucalopride and its intermediate compounds, for example, methyl 4-acetylamino-5-chloro-2,3-dihydrobenzo[b]furan-7-carboxylate and alkyl 4-[[(4-amino-5-chloro-2,3-dihydro-7-benzofuranyl)carbonyl]-amino]-1-piperidinecarboxylate.
A useful method for Alloc removal from secondaryamines on solid-phase has been optimised. The use of Me2NH·BH3 (40 equiv., 40 min) as scavenger of the allyl cations in a palladium-catalysed process with Pd[PPh3]4 leads to quantitative removal of the Alloc group without any allyl back alkylation. Other scavengers such as morpholine or PhSiH3 are clearly inferior. Furthermore, this study has highlighted