Synthesis and domino reactions of 1,1-bis(hydroxymethyl)allenes
作者:Peter Langer
DOI:10.1039/a901208g
日期:——
The reaction of dilithiated 1,1-diphenylallene with aryl ketones provides a convenient access to novel 1,1-bis(hydroxymethyl)allenes, which undergo Friedel–Crafts-type domino reactions upon treatment with TsOH.
The first elimination reactions of silyl enol ethers to lithiated allenes are reported. These reactions allow a direct transformation of readily available silyl enol ethers into functionalized allenes. The action of three to four equivalents of lithium diisopropylamide (LDA) on silyl enol ethers results in the formation of lithiated allenes by initial allylic lithiation, subsequent elimination of a lithium