Abstract
- We describe here effective epimerization of trans to cis isomer of l-benzyl-3-arylaziridine-2-carboxylates. The combination of samarium metal, iodine and N,N-dimethylaminoethanol promoted the epimerization of trans isomer to a ca. 1 : 1 mixture of cis and trans ones. Investigating more effective catalyst, indium chloride was found to afford a ca. 2 : 1 mixture of cis and trans isomers. Epimerization at benzylic position in the aziridines is suggested from the result with optically active ones. Preparation of cis-2-indolylaziridine towards construction of aziridinomitosene skeleton was achieved in this epimerization reaction.
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