methyl sulfones with unlike relative configuration at C-1 and C-4 (by X-ray diffraction studies), in support of processes involving the intermediacy of a sultine arising from the suprafacial hetero-Diels–Alder addition of SO2 to diene 9.
(E,E)-1-苄氧基-2-甲基戊-1,3-二烯(9)与3,3-二甲基-2-(三甲基甲
硅烷氧基)
丁烯与(Z)-3-(三甲基甲
硅烷氧基)戊-的反应SO 2中的2-烯和
路易斯酸生成甲
硅烷基亚
磺酸盐,将其用MeI淬灭,生成相应的(Z)-4-苄氧基-1,3-二甲基烷-2-烯基甲基砜,在C-1和C-4(由X射线衍射研究),在支持涉及从suprafacial杂狄尔斯-阿尔德加成SO的引起的sultine的中间性流程2与二烯9。