An enantioselective aldol reaction between ketones and ketene silyl acetals is described using CuF-chiral phosphine as a catalyst. The key for high enantioselectivity was the development of a novel ligand derived from Taniaphos combined with the unique accelerative effect of PhBF3K. These conditions are applicable to various substrates such as aromatic, aliphatic, and heteroaromatic ketones. In the
Cleavage of the C-Si bond in Trifluoro(phenyl)silane with Aliphatic Alcohols
作者:M. G. Voronkov、E. V. Boyarkina、I. A. Gebel'、A. I. Albanov、S. V. Basenko
DOI:10.1007/s11176-006-0015-1
日期:2005.12
Trifluoro(phenyl)silane reacts with aliphatic alcohols under reflux. The reaction involves not only Si-F bond cleavage to form ethoxyfluoro(phenyl)silanes, but also C-Si bond cleavage to form benzene and alkoxyfluoro- and tetraalkoxysilanes. The formation of the latter products was proved by 19F and 29Si NMR spectroscopy and also by model disproportionation reactions of trifluoro(phenyl)silane with trimethoxy-(phenyl)-
三氟(苯基)硅烷在回流下与脂肪醇反应。该反应不仅涉及Si-F键裂解形成乙氧基氟(苯基)硅烷,而且涉及C-Si键裂解形成苯以及烷氧基氟-和四烷氧基硅烷。后一种产物的形成通过19 F和29 Si NMR光谱以及三氟(苯基)硅烷与三甲氧基-(苯基)-,四甲氧基-或四乙氧基硅烷的模型歧化反应证明。
Peppard; Brown; Johnson, Journal of the American Chemical Society, 1946, vol. 68, p. 78
作者:Peppard、Brown、Johnson
DOI:——
日期:——
Emeleus, H. J.; Heal, H. G., Journal of the Chemical Society