Wurtz-type reductive coupling reaction of primary alkyl iodides and haloorganotins in cosolvent/H2O(NH4Cl)/Zn media as a route to mixed alkylstannanes and hexaalkyldistannanes
作者:Daniele Marton、Massimo Tari
DOI:10.1016/s0022-328x(00)00388-0
日期:2000.10
Mixed tetra-alkylstannanes R3SnR′ (R=Et, n-Pr, n-Bu and R′=Me, Et, n-Pr, n-Bu, n-Pent) and R2SnR′2 (R=n-Bu and R′=Me, Et, n-Pr, n-Bu) can be easily prepared in a one-pot synthesis via coupling reaction of alkyl iodides R′I with R3SnX (X=Cl, I) and R2SnCl2 compounds in cosolvent–H2O(NH4Cl) medium mediated by zinc dust. Coupling also occurs with (Bu3Sn)2O. It has been verified that reactions are possible
混合四alkylstannanes - [R 3 SNR'(R =的Et,正- PR,正Bu和R'=甲基,乙基,正- PR,正-卜,正被压抑)和R 2 SNR' 2(R = Ñ - Bu和R'=甲基,乙基,正- PR,正-丁基)可以以一锅合成通过其中R耦合烷基碘的'1反应容易地制备3 SNX(X =氯,I)以及R锌粉介导的助溶剂– H 2 O(NH 4 Cl)介质中的2种SnCl 2化合物。(Bu 3 Sn)2也会发生偶联O.已经证实,只有与伯烷基碘化物才可能发生反应。与仲烷基碘化物偶联反应失败。当使用烷基氯化物和溴化物时,获得二丁化合物代替不对称的四烷基锡烷。这代表了通往六烷基二氢呋喃的途径。