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