The reaction of N-trimethylsilyl-amides and -lactams with dimethyl(chloromethyl)chlorosilane. Kinetically controlled formation of (NSi) chelate intermediates, O-[(dimethylchlorosilyl)methyl]imidates and their rearrangement to final(OSi) chelate N-[(dimethylchlorosilyl)methyl]amides and lactams
作者:I.D. Kalikhman、A.I. Albanov、O.B. Bannikova、L.I. Belousova、M.G. Voronkov、V.A. Pestunovich、A.G. Shipov、E.P. Kramarova、Yu.I. Baukov
DOI:10.1016/0022-328x(89)85379-3
日期:1989.2
transformation of III affords previously unknown O-(dimethylchlorosilyl)methylated intermediates, O-[(dimethylchlorosilyl) methyl]imidates (IV) containing a hypervalent ClSiN bond. The already known products, (OSi) chelate N-[(dimethylchlorosilyl)methyl]amides (V), arise from the reaction carried out under thermodynamic control. The same compounds are also formed via the Chapman rearrangement of the intermediates
通过NMR监测显示了二甲基(氯甲基)氯硅烷(I)与N-三甲基甲硅烷基酰胺和-内酰胺(II)反应的多阶段特征。反应物的相互作用以硅烷基化开始,得到Me 3 SiCl和相应的N- [二甲基(氯甲基)甲硅烷基]酰胺或-内酰胺(III)。第二阶段,不稳定的Ⅲ的分子内(二甲基氯甲硅烷基)甲基化在两个方向上进行。动力学控制的Ⅲ的转化提供了以前未知的O-(二甲基氯甲硅烷基)甲基化的中间体,含高价Cl 3 Si 3 N键的O -[(二甲基氯甲硅烷基)甲基]亚氨酸酯(Ⅳ)。已知产品(OSi)螯合N-[((二甲基氯甲硅烷基)甲基]酰胺(V),是在热力学控制下进行的反应产生的。经由中间体(IV)的查普曼重排也形成相同的化合物。