Facile Preparation of Allenic Hydroxyketones via Rearrangement of Propargylic Alcohols
作者:Michael E. Jung、Joseph Pontillo
DOI:10.1021/ol9900257
日期:1999.8.1
[formula: see text] Treatment of tertiary propargylic alcohols 13 with 3-diazo-2-butanone 6 and catalytic dirhodium tetraacetate in benzene gave good yields of the diastereomeric allenic hydroxyketones 14, with, in some cases, good diastereocontrol. These products are presumably formed via the [2,3]-sigmatropic rearrangement of an alpha-propargyloxy enol derivative. This reaction has been extended
用苯中的3-重氮-2-丁酮6和催化的四乙酸二钠乙酸酯处理叔炔丙醇13可得到良好的非对映异构烯丙基羟基酮14,在某些情况下,具有良好的非对映异构控制能力。这些产物大概是通过α-炔丙基氧基烯醇衍生物的[2,3]-σ重排而形成的。该反应已经扩展到通过与6和铑催化剂反应从烯丙基醇制备均烯丙基羟基酮。