作者:T Lébl、J Holeček、M Dymák、D Steinborn
DOI:10.1016/s0022-328x(00)00887-1
日期:2001.4
2-functionalised vinylstannanes (E)/(Z)-Ph3SnCR′CHYRn with acetic and chloroacetic acid in CDCl3 proceeded by protodestannylation yielding Ph3SnOOCCH2X (X=H, Cl) and CHR′CHYRn. The results of kinetics measurements reveal that Lewis-basic substituents YRn facilitate the electrophilic cleavage of SnC bonds, and this effect increases with the basicity of the heteroatom Y, i.e. in the order S
类型(的官能乙烯基锡烷ë)/(Ž)-Ph 3 SnCR'CHYR Ñ和(ë)/(Ž)-Ph 3的SnO(YR Ñ)CHR'(YR Ñ = NME 2,OET,SMe的,SEt; R'= Ph,Bu(正丁基),Pe(正戊基),H)是通过非催化或Pd催化的氢化锡烷基化反应制备的。通过制备型HPLC分离特定的立体异构体,并使用1 H,13 C和119 Sn-NMR光谱进行全面表征。2-官能化乙烯基锡的反应(E)/(ž)-博士3 SnCR'CHYR Ñ与在CDCl乙酸和氯乙酸3通过protodestannylation获得pH进行3 SnOOCCH 2 X(X = H,C1)和CHR'CHYR Ñ。动力学测量的结果表明,路易斯碱性取代基YR n促进了SnCthe键的亲电裂解,并且这种影响随着杂原子Y的碱度而增加,即S