Iron(III) p-toluenesulfonate catalyzed synthesis of homoallyl ethers from acetals and aldehydes
作者:Matthew J. Spafford、Erin D. Anderson、Joshua R. Lacey、Ann C. Palma、Ram S. Mohan
DOI:10.1016/j.tetlet.2007.10.026
日期:2007.12
Iron(III) p-toluenesulfonate, Fe(OTs)3·6H2O, is an inexpensive, versatile and commercially available catalyst for the allylation of acetals using allyltrimethylsilane to yield homoallyl ethers in moderate to good yields. The one-pot conversion of aldehydes to homoallyl ethers using alkoxysilanes has also been accomplished using Fe(OTs)3·6H2O as a catalyst. The use of mild reaction conditions and a
HClO4-supported on silica gel: a mild and efficient catalyst for Hosomi–Sakurai reaction
作者:Kaliyappan Murugan、Chinpiao Chen
DOI:10.1016/j.tetlet.2011.08.145
日期:2011.11
Perchloric acid supported on silicagel was found to be an efficient catalyst (2 mol %) for the Hosomi–Sakurai allylation of numerous aldehydes with allyltrimethylsilane in the presence of benzyl alcohol. This method was also effective for the allylation of secondary alcohols under mild experimental conditions.
Bismuth Compounds in Organic Synthesis. A One-Pot Synthesis of Homoallyl Ethers and Homoallyl Acetates from Aldehydes Catalyzed by Bismuth Triflate
作者:Peter W. Anzalone、Ashvin R. Baru、Eric M. Danielson、Patrick D. Hayes、Mai P. Nguyen、Ambrose F. Panico、Russell C. Smith、Ram S. Mohan
DOI:10.1021/jo048475m
日期:2005.3.1
[GRAPHICS]Three one-pot methods for the conversion of aldehydes to homoallyl ethers catalyzed by Bi(OTf)(3)center dot xH(2)O (1 < x < 4) have been developed. The one-pot synthesis of homoallyl ethers can be achieved either by in situ generation of the acetal followed by its reaction with allyltrialkylsilane or by a three-component synthesis in which the aldehyde, trimethylorthoformate or an alkoxytrimethylsilane and allyltrimethylsilane are mixed together in the presence of bismuth triflate (0.1-1.0 mol %). In addition, a three-component synthesis of homoallyl acetates, which is achieved by reacting the aldehyde, acetic anhydride, and allyltrimethylsilane in the presence of bismuth triflate (3.0-5.0 mol %), has been developed. The use of a relatively nontoxic, easy to handle, and inexpensive catalyst adds to the versatility of these methods.
Iodine-catalyzed one-pot three-component synthesis of homoallyl benzyl ethers from aldehydes
作者:Dolly Kataki、Prodeep Phukan
DOI:10.1016/j.tetlet.2009.02.052
日期:2009.4
Iodine has been found to be an effective catalyst for one-pot synthesis of homoallyl benzyl ethers under mild reaction conditions. Various homoallyl benzyl ethers were synthesized in moderate to high yield by three-component condensation of aldehydes, benzyloxytrimethylsilane, and allyltrimethylsilane in presence of iodine (10 mol %) in dichloromethane at 0 degrees C. (C) 2009 Elsevier Ltd. All rights reserved.