Controlled carbon–sulphur or carbon–silicon bond cleavage in the reactions of alkyl-lithium reagents with a 1-silyl-1-thioallene
作者:Alexander J. Bridges、Victor Fedji、Eugene C. Turiwski
DOI:10.1039/c39830001093
日期:——
3-Methyl-1-phenylthio-1-trimethylsilylbuta-1,2-diene (3) reacts with different alkyl-lithium reagents by C–Si or C–S bond cleavage, rather than by Michael addition or metallation; one product, the α-silyl-α-lithioallene (6), is alkylated mainly γ with carbonyl compounds, but is silylated α with Et3SiCl to from the 1,1-bis-silylallene Me2CCC(SiEt3)SiMe3.
3-甲基-1-苯硫基-1-三甲基甲硅烷基丁二烯-1,2-二烯(3)与不同的烷基锂试剂通过C-Si或C-S键断裂而不是通过迈克尔加成或金属化反应进行反应;一种产物,α-甲硅烷基-α-硫代丙二烯(6),主要是用羰基化合物对γ进行烷基化,但是用Et 3 SiCl甲硅烷基化生成1,1-双甲硅烷基亚丙Me 2 C C C(SiEt 3) SiMe 3。