Synthetic studies on O-heterocycles via cycloadditions. Part 2. Adducts from styrene oxides
作者:Paul Clawson、Patricia M. Lunn、Donald A. Whiting
DOI:10.1039/p19900000159
日期:——
The styreneoxides (14) and (15), bearing electron-withdrawing functions, readily undergo thermal and photochemical (triplet sensitised) dipolar cycloadditions with simple electron-deficient olefins, regioselectively in the case of methyl acrylate. However, cycloadditions with 5-arylbutenolides as dipolarophiles, required for lignan synthesis, could not be effected in significant yield. A new short