The exchange reaction of α-mercurated ketones with bis(triethylsilyl)- (I) and bis(triethylgermyl)mercury (II) leads to the formation of the corresponding triethylsilyl and triethylgermyl enol ethers. O-Silylated and O-germylated enolates derived from ketones and aldehydes can be also prepared by treating mercurials I and II with appropriate α-bromo-carbonyl compounds. This new pathway also represents
The action of triethylsilane on α-ethylenic aldehydes has been studied in the presence of two types of nickel catalysts as well as palladium on charcoal. Two phenomena can result: either 1,2 or 1,4 additions only, the trans-1,4 adduct being predominant, or a competition between these two additions and coupling reactions. A comparative regioselective and stereoselective study was carried out making
Action de trialkylsilanes sur les aldehydes aliphatiques
作者:Emile Frainnet、Rolland Bourhis
DOI:10.1016/s0022-328x(00)94004-x
日期:1975.7
The possibility of obtaining enoxysilanes by action of trialkylsilanes HSiR′3 on aliphatic aldehydes RCHO in the presence of various nickel catalysts has been closely studied. Mechanisms are proposed to interpret the results.