ethyl 2-((3-chloro-6-oxocholesta-2,4-dien-2-yl)methylene)cyanoacetate 在
sodium azide 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 5.0h,
以72%的产率得到(1R,2S,5R,6R,9S,10S)-1,5-dimethyl-6-[(2R)-6-methylheptan-2-yl]-12-oxo-16,17,18,19-tetrazahexacyclo[11.11.0.02,10.05,9.015,23.016,20]tetracosa-13,15(23),17,19,21-pentaene-21-carbonitrile