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
The survival of -butyldimethylsilyl group of silyl enol ethers in the reaction with dimethyl(methylene)ammonium iodide. Regioselective synthesis of -butyldimethylsilyl enol ethers containing an amino group.
作者:Makoto Wada、Yoshihiro Nishihara、Kin-ya Akiba
DOI:10.1016/s0040-4039(01)91296-1
日期:1984.1
-butyldimethylsilyl enol ethers containing an amino group were obtained in good yields (70–90%) by the reaction of -butyldimethylsilyl enol ethers with dimethyl(methylene)ammonium iodide (the Eschenmoser salt).