(Sn-Mont) was found to be a powerful heterogeneouscatalyst for the cyanosilylation of various ketones including congested ones with a bulky cyanide source, tert-butyldimethylsilyl cyanide (TBDMSCN), giving the corresponding cyanohydrin tert-butyldimethylsilyl ethers in good (85%) to excellent (>98%) yields at room temperature. Compared to the previously reported catalysts, Sn-Mont is easy to prepare, environmentally
Palladium-Catalyzed Cross-Coupling of Cyanohydrins with Aryl Bromides: Construction of Biaryl Ketones
作者:Huifang Dai、P. Andrew Evans、Jadab Majhi、Bohang Zhou、Yuxin Zhuang、Mai-Jan Tom
DOI:10.1055/a-1850-3687
日期:——
The palladium-catalyzedcross-coupling of the lithium anion of aryl tert-butyldimethylsilyl-protected cyanohydrins with arylbromides followed by in situ deprotection with fluoride ion provides a convenient and versatile approach to biaryl ketones. This protocol represents the first example of a palladium-catalyzed arylation of a cyanohydrin, which functions as an acyl anion equivalent. Hence, in contrast