Trimethysilyl triflate in organic synthesis11Part 11 of this series. Part 10: S. Murata and R. Noyori, Tetrahedron Letters 2107 (1981).
作者:R. Noyori、S. Murata、M. Suzuki
DOI:10.1016/s0040-4020(01)93263-6
日期:——
Trimethylsilyl triflate is a powerful silylating agent for organic compounds and acts as a catalyst which accelerates a variety of nucleophilic reactions in aprotic media. The reactions proceed via one-center, electrophilic coordination of the silyl group to hetero functional groups and exhibit unique selectivities.
Stereoselective Cross-Aldol Reactions of Silyl Enol Ethers with Acetals Catalyzed by Iodotrimethylsilane
作者:Hideki Sakurai、Koshi Sasaki、Akira Hosomi
DOI:10.1246/bcsj.56.3195
日期:1983.10
Iodotrimethylsilane catalyzes effectively erythroselective aldol type condensation of silyl enol ethers with acetals.
碘三甲基硅烷能有效催化烯醇硅醚与缩醛的红选择性醛醇型缩合反应。
Trimethylsilyl trifltate catalyzed aldol-type reaction of enol silyl ethers and acetals or related compounds
作者:Shizuaki Murata、Masaaki Suzuki、Ryoji Noyori
DOI:10.1016/s0040-4020(01)86671-0
日期:1988.1
condensation of enol trimethylsllyl ethers with acetals, orthoformate, or 2-acetoxytetrahydrofuran or -pyrans to give the corresponding β-alkoxy carbonylcompounds. Reaction of enolsilylethers and carboxonium triflate ion-pair intermediates occurs via acyclic transition states and exhibits moderate to high erythro selectivity independent of the geometry (E/Z) of the enolsilylethers.
Lewis Acid Mediated Selective Chalcogenalkylation of Silyl Enol Ethers with [O,S]-Acetals
作者:Antonio L. Braga、Luciano Dornelles、Claudio C. Silveira、Ludger A. Wessjohann
DOI:10.1055/s-1999-3429
日期:1999.4
Silyl enol ethers of ketones were selectively alkylated with [O,S]-acetals mediated by Lewis acid in a Mukaiyama type Aldol reaction. The products were β-alkoxy- and /or β-sulfanyl carbonyl compounds depending on the catalyst employed.
Trialkylsilyl triflates. 5. A stereoselective aldol-type condensation of enol silyl ethers and acetals catalyzed by trimethylsilyl trifluoromethanesulfonate