(3S,5S,6S,2'S,4'S,5'S)-(-)-4-(tert-butoxycarbonyl)-5-(O1-tert-butyl-L-valinyl-L-alanyl)carbonyl-6-{1-[N,N-di-(tert-butoxycarbonyl)guanidino]-2'-hydroxy-4',5'-O-isopropylideneheptane-7'-yl}-3-methyl-2-piperazinone 在
咪唑 、
碘 、
三苯基膦 作用下,
以
二氯甲烷 为溶剂,
反应 3.0h,
以67%的产率得到(3S,5S,6S,2'S,3'S,4''R)-(-)-6-{1'-[N,3''-di-(tert-butoxycarbonyl)-2''-imino-imidazolidin-4''-yl]-2',3'-O-isopropylidenehexan-5'-yl}-4-(tert-butoxycarbonyl)-5-(O1-tert-butyl-L-valinyl-L-alanyl)carbonyl-3-methyl-2-piperazinone