开发了第一金(III)催化的以吡啶N-氧化物为氧化剂的二炔1的区域选择性氧化/环异构化,以中等至良好的产率提供了一系列具有合成价值的有用的熔融呋喃衍生物3。对照实验和次要产物的确认结构5表明,这种化学是协调一致的金(III)催化的氧化/ S Ñ 2'-型加成/环化经由β-金vinyloxypyridinium中间和推定的乙烯基阳离子中间过程。
Gold(I)-Catalyzed Synthesis of γ-Hydroxyketones from 5-Allyloxy-1-ynes
作者:Jae Youp Cheong、Donghong Im、Miryeong Lee、Wontaeck Lim、Young Ho Rhee
DOI:10.1021/jo102005x
日期:2011.1.7
The Au(I)-catalyzed reactions of 5-allyloxy-1-ynes gave various gamma-hydroxyketones, via a hydration-terminated domino sequence involving sigmatropic allyl migration as the key event. Moreover, the scope of the sigmatropic allyl transfer was systematically determined.