(1R,4S,5S,6S)-4-(2'S-4'-methylthio-2'-(tert-butoxycarbonyl)aminobutanoyl)amino-2,2-dioxo-2λ6-thiabicyclo[3.1.0]hexane-4,6-dicarboxylic acid 、
对甲苯磺酸 以
甲苯 为溶剂,
以98%的产率得到(1R,4S,5S,6S)-4-(2'S-4'-methylthio-2'-aminobutanoyl)amino-2,2-dioxo-2λ
6-thiabicyclo[3.1.0]hexane-4,6-dicarboxylic acid tosylate