The Diels-Alder reaction of methyl 2-pyrone-5-carboxylate and bis(trimethylsilyl)acetylene gave methyl 3,4-bis(trimethylsilyl)-benzoate which was transformed into [5-(methoxycarbonyl)-2-(trimethylsilyl)phenyl](phenyl)iodonium triflate by the reaction with a hypervalent iodine reagent PhI(OAc)2/TfOH. The generation and trapping reactions of 4-(methoxycarbonyl)-1,2-didehydrobenzene were successfully conducted by the reaction of the iodonium triflate with Bu4NF.
甲基2-
吡�酮-5-
羧酸酯与双(三甲基
硅基)
乙炔的Diels-Alder反应生成了甲基3,4-双(三甲基
硅基)
苯甲酸酯,该产物通过与高
碘试剂PhI(OAc)2/TfOH反应转化为[5-(甲氧羰基)-2-(三甲基
硅基)苯基](苯基)
碘鎓
三氟甲磺酸盐。通过该
碘鎓
三氟甲磺酸盐与Bu4NF的反应,成功实现了4-(甲氧羰基)-1,2-二去氢苯的生成与捕获反应。