作者:C. V. Asokan、M. P. Balu、H. Ila、H. Junjappa
DOI:10.1055/s-1988-27690
日期:——
(3-Dimethylamino-2-propenoyl)ketene dithioacetals 3a-c, obtained by condensation of the corresponding acylketene dithioacetals 1a-c with dimethylformamide diethyl acetal, undergo 1,4-additions with alkyl Grignard reagents (RMgX, R = CH3, C2H5, n-C3H7 and i-C3H7) on the enaminone moiety to afford the title compounds 4a-l in good yields.
通过相应的酰基乙酰亚胺二硫代乙缩醛1a-c与二甲基甲酰胺二乙缩醛的缩合反应,制得(3-二甲氨基-2-丙烯酰基)乙酰亚胺二硫代乙缩醛3a-c。这些化合物与烷基格氏试剂(RMgX,R = CH3、C2H5、n-C3H7和i-C3H7)在烯胺酮部分进行1,4-加成反应,以良好产率得到目标化合物4a-l。