Sequential homogenous catalysis. Catalytic formation of allylic and β-keto silyl ethers from dihydrosilanes and the corresponding alcohols followed by intramolecular hydrosilation
作者:Xianqi Wang、William W. Ellis、B. Bosnich
DOI:10.1039/cc9960002561
日期:——
The catalyst, [Rh(Ph(2)PCH(2)CH(2)PPh(2))](+) engages in consecutive catalytic sequence where allylic alcohols, beta-keto alcohols and alpha,beta-unsaturated aldehydes in the presence of dihydrosilanes are first converted to the corresponding monohydrosilyl ethers, which are then cyclized.
B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-Catalyzed Silation of Alcohols: A Mild, General Method for Synthesis of Silyl Ethers
作者:James M. Blackwell、Katherine L. Foster、Victoria H. Beck、Warren E. Piers
DOI:10.1021/jo9903003
日期:1999.6.1
The commercially available borane tris(pentafluorophenyl)borane, B(C(6)F(5))(3), is an effective catalyst for the dehydrogenative silation of alcohols using a variety of silanes, R(3)SiH, R(2)SiH(2), and R(2)R'SiH. Generally, the reactions occur in a convenient time frame at room temperature using 2 mol % of the borane and are clean and high yielding, with dihydrogen as the only byproduct. Primary