Sur l'obtention hautement regio-et stereoselective d'enoxysilanes par action du bis(trimethylsilyl) acetamide en milieu hmpt sur les derives carbonyles enolisables
作者:James Dedier、Pierre Gerval、Emile Frainnet
DOI:10.1016/s0022-328x(00)85896-9
日期:1980.2
The authors describe a new and general method for the preparation of enoxysilanes by silylation of enolizable aldehydes and ketones by use of bis(trimethylsilyl) acetamide in HMPT, in the presence of very small quantities of sodium metal(or another basic agent) as catalyst. This method was found to proceed rapidly, with good yields, and is highly regio-and stereo-selective (giving the Z isomer, orientation
作者描述了一种新的通用方法,该方法是在非常少量的钠金属(或另一种碱性试剂)存在的情况下,通过在HMPT中使用双(三甲基甲硅烷基)乙酰胺对可烯化的醛和酮进行甲硅烷基化来制备环氧硅烷。发现该方法快速进行,具有良好的产率,并且是高度区域选择性和立体选择性的(给出Z异构体,由动力学控制产生取向)。提出了这种反应的机理以及对观察到的区域选择性和立体选择性的解释。