Evaluation of C-trialkylsilyl enol and thioenol ethers as intermediates in the synthesis of acylsilanes
作者:Catherine Hammaecher、Imad Ouzzane、Charles Portella、Jean-Philippe Bouillon
DOI:10.1016/j.tet.2004.10.082
日期:2005.1
C-silyl enol ethers or thioenol ethers have been prepared by a Peterson reaction, as intermediates for acylsilane synthesis. Bis(trialkylsilyl)(methoxy)- or -(methylsulfanyl)methanes bearing identical or different trialkylsilyl groups were used as starting materials in order to assess the selectivity of the Peterson elimination step. A good selectivity was observed only with ethers bearing the TMS
通过Peterson反应已经制备了C-甲硅烷基烯醇醚或硫烯醇醚,作为酰基硅烷合成的中间体。为了评估彼得森消除步骤的选择性,将带有相同或不同三烷基甲硅烷基的双(三烷基甲硅烷基)(甲氧基)-或-(甲基硫烷基)甲烷用作起始原料。仅用带有TMS和TBDMS基团的醚观察到良好的选择性。然而,由于难以以正确的产率获得这些试剂,因此没有实际的兴趣来使用这些试剂。事实证明,双(三甲基甲硅烷基)(甲基硫烷基)甲烷是制备C-甲硅烷基硫烯醇醚的良好试剂,C-甲硅烷基硫烯醇醚在传统的酸性条件下可以水解,从而以合理的总收率得到酰基硅烷。该方便的过程扩展到双(酰基硅烷)的合成。