马来酸酐 、
(2R*,3S*,4S*,5R*,6S*)-2,6-di-2-furyl-3,5-dimethyl-4-phenylpiperidin-4-ol 以
甲苯 为溶剂,
以88%的产率得到(1R*,2R*,3S*,4R*,6aR*,7S*,8R*,10aS*,10bS*)-4-(2-furyl)-2-hydroxy-1,3-dimethyl-6-oxo-2-phenyl-1,3,4,6,6a,7,8,10b-octahydro-2H-8,10a-epoxypyrido[2,1-a]isoindole-7-carboxylic acid