dimethyl (S,Z)-2-(2-(((2-methoxy-2-oxo-1-phenylethylidene)amino)oxy)ethyl)cyclopropane-1,1-dicarboxylate 在
ytterbium(III) triflate 作用下,
以
二氯甲烷 为溶剂,
以100%的产率得到trimethyl (3aR,6S)-6-phenyl-2,3,3a,4-tetrahydropyrrolo[1,2-b][1,2]oxazole-5,5,6-tricarboxylate