Either [1,3]- or [3,3]-sigmatropic rearrangements were selectively accessed by controlling the reaction temperature in the gold(III)-catalyzed tandem rearrangement/cyclization of (E)-2-(aryloxymethyl)alk-2-enoates to afford diversely substituted 3,4-dihydrocoumarin derivatives in moderate to good yields and in excellent regioselectivity.
通过控制
金 (III) 催化的 (E)-2-(芳氧基甲基)alk-2- 串联重排/环化中的反应温度,选择性地进行 [1,3]- 或 [3,3]- σ 重排烯酸酯以中等至良好的产率和出色的区域选择性提供多种取代的 3,4-二氢
香豆素衍
生物。