申请人:Mcgowan Graham
公开号:US20130331593A1
公开(公告)日:2013-12-12
Treprostinil is prepared by a process which involves Pauson-Khan cyclization of an an alkene-substituted, alkyne-substituted benzene corresponding to formula: (I) where PMB represents para-methoxy benzyl protecting group and R
1
and R
2
are alcohol protecting groups. Following cyclization, the resulting compound can be subjected to several chemical trans-formations followed by alkylation, hydrolysis and salt formation to yield treprostinil sodium. The use of para-methoxybenzyl group as the phenolic protecting group confers several process advantages that result in simplified purification of the final product and improved yields.
Treprostinil是通过涉及Pauson-Khan环化的过程制备的,该过程涉及与公式对应的烯烃取代、炔烃取代苯的Pauson-Khan环化:(I),其中PMB代表对甲氧基苄保护基,R1和R2是醇保护基。在环化之后,所得化合物可以经历几种化学转化,然后进行烷基化、水解和盐形成,以产生曲前列素钠。将对甲氧基苄基作为酚保护基的使用赋予了几种工艺优势,从而简化了最终产品的纯化并提高了产量。