N-[(1S,11S,13S)-5,6,7,15-tetramethoxy-17-(6-methylpyridin-2-yl)-14-oxo-18-oxa-17-azatetracyclo[11.3.2.02,12.03,8]octadeca-2(12),3,5,7,15-pentaen-11-yl]acetamide 、
1,3-环己二烯 以
氯仿 为溶剂,
反应 5.0h,
以89%的产率得到3-(6-methyl-2-pyridyl)-2-oxa-3-aza-bicyclo[2.2.2]oct-5-ene