Mixed Organofluorine−Organosilicon Chemistry. 13. One-Pot Synthesis of Difluoroaldols from Acylsilanes and Trifluoromethyltrimethylsilane. Application to the Synthesis of a Difluoro Analogue of Egomaketone
作者:Olivier Lefebvre、Thierry Brigaud、Charles Portella
DOI:10.1021/jo001549j
日期:2001.3.1
3 were synthesized in a one-pot procedure involving an acylsilane 1, trifluoromethyltrimethylsilane (TFMTMS), and an aldehyde. The key intermediate of this reaction is a difluoroenoxysilane 2. Ytterbium triflate proved to be a very efficient catalyst for promoting the aldol type reaction under very mild conditions. The potential of this reaction for the convergent synthesis of difluorinated compounds
通过一锅法合成二氟醛醇化合物3,该方法涉及酰基硅烷1,三氟甲基三甲基硅烷(TFMTMS)和醛。该反应的关键中间体是二氟乙氧基硅烷2。三氟甲磺酸Y被证明是在非常温和的条件下促进醛醇型反应的非常有效的催化剂。通过相应的醛醇化合物3d的脱水合成二氟庚基酮7d,说明了该反应对二氟化合物的收敛合成的潜力。