(S)-{2-[2,2-bis(benzenesulfonyl)ethyl]phenyl}[(5R)-5-{[(1R,2S,5R)-5-methyl-2-(propan-2-yl)cyclohexyl]oxy}-2-oxo-2,5-dihydrofuran-3-yl]methyl acetate 在
caesium carbonate 作用下,
以
四氢呋喃 为溶剂,
以95%的产率得到(6R,7R)-8,8-bis(benzenesulfonyl)-6-{[(1R,2S,5R)-5-methyl-2-(propan-2-yl)cyclohexyloxy]}-5-oxatricyclo[8.4.0.03,7]tetradeca-1-(14)2,10,12-tetraen-4-one