2-methyl-2-propanethiolate and ketenes, react with imines in the presence of stannous triflate to give the corresponding β-aminocarboxylic thioesters in an anti-selective manner. This method is successfully applied to a diastereoselective synthesis of a carbapenem antibiotic PS-5 intermediate.
锡 (II)
羧酸硫酯烯醇化物由 2-甲基-2-丙
硫醇亚
锡和烯酮原位形成,在
三氟甲磺酸亚
锡存在下与
亚胺反应,以抗选择性方式生成相应的 β-
氨基
羧酸硫酯。该方法成功应用于碳青霉烯类抗生素PS-5中间体的非对映选择性合成。