methyl 2-<2'S-(benzothiazol-2-yl)dithia-4'-oxo-3'S-phenoxycarbonylaminoazetidin-1'-yl>-3-methylenebutanoate 在
磺酰氯 作用下,
生成
methyl-2-<2'R-chloro-4'-oxo-3'S-phenoxycarbonylaminoazetidin-1'-yl>-3-chloromethyl-3-chlorosulfenylbutanoate 、 methyl-2-<2'S-chloro-4'-oxo-3'S-phenoxycarbonylaminoazetidin-1'-yl>-3-chloromethyl-3-chlorosulfenylbutanoate