6-Ethyl-7-hydroxy-2-isopropyl-3-(1-methyl-1H-benzoimidazol-2-yl)-chromen-4-one 、
(-)-12,12'-methylenedicytisine 以
1,4-二氧六环 为溶剂,
反应 2.0h,
以68%的产率得到(1R,5S)-3-{[7-hydroxy-2-isopropyl-3-(1-methyl-1H-benzimidazol-2-yl)-6-ethyl-4-oxo-4H-chromen-8-yl]methyl}-1,2,3,4,5,6-hexahydro-8H-1,5-methanopyrido[1,2-a][1,5]diazocin-8-one