Distinct Chemoselectivities in the Platinum-Catalyzed 1,2-Carboalkoxylations of 5-Alkoxypent-1-yn-3-ol Derivatives
作者:Chun-Ming Ting、Chiou-Dong Wang、Rupsha Chaudhuri、Rai-Shung Liu
DOI:10.1021/ol2002144
日期:2011.4.1
derivatives 5 produces 2,6-dioxabicyclo[3.1.0]hexanes 6; the mechanism is postulated to involve a hydroxyl-triggered [3.3]-sigmatropic allyl rearrangement. As the same catalysis is extensible to their tertiary alcohol analogues 7, distinct dihydrofuranyl alcohols 8 were obtained through a [3.3]-allyl rearrangement that is not assisted by the hydroxyl group.
报道了炔烃的两种不同的Pt催化的碳烷氧基化。5-烷氧基戊-1-yn-3-ol衍生物5的环异构化产生2,6-二氧杂双环[3.1.0]己烷6。推测该机理涉及羟基触发的[3.3]-σ烯丙基重排。由于相同的催化作用可扩展至它们的叔醇类似物7,因此通过[3.3]烯丙基重排获得了独特的二氢呋喃醇8,该羟基不受羟基的辅助。