[EN] PROCESS FOR MAKING AZETIDINE-3-CARBOXYLIC ACID<br/>[FR] PROCEDE DE FABRICATION DE L'ACIDE AZETIDINE-3-CARBOXYLIQUE
申请人:MERCK & CO INC
公开号:WO2004035538A1
公开(公告)日:2004-04-29
The present invention is directed to an improved process for synthesizing azetidine-3-carboxylic acid, comprising triflating diethylbis(hydroxymethyl)malonate followed by azetidine ring-formation by intramolecular cyclization using an amine, decarboxylation to give the mono acid azetidine and hydrogenation to give the title compound. Azetidine-3-carboxylic acid is useful as an intermediate for making certain S1P?1#191/Edg1 receptor agonists, which are immunosupressive agents.
本发明涉及一种改进的合成氮杂环丙氨酸的方法,包括对二乙基双(羟甲基)丙二酸酯进行三氟甲基化处理,然后通过内环化反应使用胺进行氮杂环丙烷环的形成,再进行脱羧反应得到单羧基氮杂环丙烷,最后进行氢化反应得到目标化合物。氮杂环丙氨酸可作为制备某些S1P?1#191/Edg1受体激动剂的中间体,这些激动剂是免疫抑制剂。