(E)-(9S,12S,18R)-12-((1R,2R,3S)-3-Chloro-2-hydroxy-1-methyl-3-phenyl-propyl)-18-(3-chloro-4-methoxy-benzyl)-9-isobutyl-8,11-dioxa-17,20-diaza-spiro[5.15]henicos-14-ene-7,10,16,19-tetraone 在
potassium carbonate 作用下,
以
乙腈 为溶剂,
生成 (E)-(9S,12S,18R)-18-(3-Chloro-4-methoxy-benzyl)-9-isobutyl-12-[(S)-1-((2R,3R)-3-phenyl-oxiranyl)-ethyl]-8,11-dioxa-17,20-diaza-spiro[5.15]henicos-14-ene-7,10,16,19-tetraone