Two New Catalysts for the Dehydrogenative Coupling Reaction of Carboxylic Acids with Silanes—Convenient Methods for an Atom‐Economical Preparation of Silyl Esters
作者:Guo‐Bin Liu、Hong‐Yun Zhao、Thies Thiemann
DOI:10.1080/00397910701465669
日期:2007.8
Abstract Tris(triphenylphosphine)cuprous chloride [Cu(PPh3)3Cl] has been found to be an efficient catalyst for the dehydrosilylation of carboxylic acids with silanes. In the presence of 4 mol% Cu(PPh3)3Cl, dehydrosilylation reactions in acetonitrile afforded the corresponding silyl esters at 80°C in good yields. It was noted that triphenylphosphine itself also functions as an adequate catalyst for
Solvent-modulated chemoselective deprotections of trialkylsilyl esters and chemoselective esterifications
作者:Adam Shih-Yuan Lee、Feng-Yih Su
DOI:10.1016/j.tetlet.2005.07.049
日期:2005.9
A series of trialkylsilyl esters were deprotected or transesterificated into their correspondingcarboxylic acids or methyl esters under a catalytic amount of CBr4 in alcohol reaction system. This method enables to desilylate secondary sp3-carbon, sp2-carbon, sp-carbon and aryl tethered trialkylsilyl esters to carboxylic acids, whereas primary sp3-carbon tethered trialkylsilyl esters were further converted
Triphenylphosphine-Catalyzed Dehydrogenative Coupling Reaction of Carboxylic Acids with Silanes – A Convenient Method for the Preparation of Silyl Esters
作者:Guo-Bin Liu、Hong-Yun Zhao、Thies Thiemann
DOI:10.1002/adsc.200600338
日期:2007.4.2
Triphenylphosphine has been found to be an efficient catalyst for the dehydrosilylation of carboxylic acids with silanes. In the presence of 4 mol % of triphenylphosphine (PPh3), dehydrosilylation reactions in DMF afforded the corresponding silyl esters at 120 °C in good yield.