柠康酸酐 、
(2RS,3SR,5RS,6SR)-3,5-dimethyl-2,6-bis(5-methyl-2-furyl)piperidin-4-one 以
甲苯 为溶剂,
以55%的产率得到(1RS,3SR,4RS,6aRS,7SR,8RS,10aSR,10bSR)-1,3,7,8-tetramethyl-4-(5-methyl-2-furyl)-2,6-dioxo-1,3,4,6,6a,7,8,10b-octahydro-2H-8,10a-epoxypyrido[2,1-a]isoindole-7-carboxylic acid