Allene Synthesis via C−C Fragmentation: Method and Mechanistic Insight
作者:Robert V. Kolakowski、Madhuri Manpadi、Yue Zhang、Thomas J. Emge、Lawrence J. Williams
DOI:10.1021/ja906189h
日期:2009.9.16
A new method of allene synthesis is described. Suitably functionalized vinyl triflates undergo fragmentation to give allenes in high yield. Computational and experimental data provide a mechanistic framework for allene formation and the complementary formation of alkynes. The method is stereospecific.
Allenic β-ketoesters and , readily prepared from allenic alcohols, lead respectively to the compounds and under the action of catalytic amounts of yellow mercury (II) oxide and p-toluenesulfonic acid.