Metal Chloride-Promoted Aldol Reaction of α-Dimethylsilylesters with Aldehydes, Ketones, and α-Enones
作者:Katsukiyo Miura、Akira Hosomi、Takahiro Nakagawa
DOI:10.1055/s-2005-871938
日期:——
In the presence of a catalytic amount of LiCl, α-dimethylsilylesters (α-DMS-esters) 1 smoothly reacted with various aldehydes at 30 °C to give aldols in good to high yields. On the other hand, the aldol reaction with ketones was effectively promoted by MgCl2 rather than by LiCl. α-Enones also underwent the metal chloride-promoted addition of 1 at the carbonyl carbon or β-carbon.
在氯化锂(LiCl)的催化量存在下,α-二甲基硅醚(α-DMS-酯)1在30°C下顺利与各种醛反应,以良好至高收率生成醇醛化合物。另一方面,酮的醇醛反应更有效地被氯化镁(MgCl2)而非氯化锂(LiCl)促进。α-烯酮也能在羰基碳或β-碳上经历金属氯化物促进的1的加成反应。