tert-butyl (1S,3R,5S,6S,7S)-3-(tert-butyl)-7-chloro-6-hydroxy-7-{2-[(tert-butyldiphenylsilyl)oxy]ethyl}-2-oxa-4-azabicyclo[3.2.0]heptane-4-carboxylate 、
3-溴丙烯 在
potassium hydride 作用下,
以
四氢呋喃 、 mineral oil 为溶剂,
以90%的产率得到tert-butyl (1S,3R,5S,6S,7S)-3-(tert-butyl)-7-chloro-6-allyloxy-7-{2-[(tert-butyldiphenylsilyl)oxy]ethyl}-2-oxa-4-azabicyclo[3.2.0]heptane-4-carboxylate