6-chloronicotinamidine 、 methyl (2R,3S,3aR,8bR)-8b-hydroxy-6,8-dimethoxy-3a-(4-methoxyphenyl)-1-oxo-3-phenyl-2,3,3a,8b-tetrahydro-1H-cyclopenta[b]benzofuran-2-carboxylate 在
4-二甲氨基吡啶 作用下,
以
间二甲苯 为溶剂,
反应 0.75h,
以92%的产率得到(5R,5aR,10bS)-2-(6-chloropyridin-3-yl)-10b-hydroxy-8,10-dimethoxy-5a-(4-methoxyphenyl)-5-phenyl-3,5,5a,10b-tetrahydro-4H-benzofuro[2',3':4,5]cyclopenta[1,2-d]pyrimidin-4-one