1,7,8-triaza-3,3,6,6-tetramethyl-5-oxa-2-oxo-1-(p-methylphenyl)spiro[3,4]oct-7-ene 、
4-甲氧基苯异腈 以
1,4-二氧六环 为溶剂,
反应 12.0h,
以83%的产率得到1-[3,3-dimethyl-2-oxo-1-(p-tolyl)azetidin-4-yl]-2-[(Z)-3,3-dimethyl-2-oxo-1-(p-tolyl)azetidin-4-ylidene]-5-methoxy-3-(p-methoxyphenylimino)-2,3-dihydroindole