Addition of arylstannanes to alkynes giving <i>ortho</i>-alkenylarylstannanes catalysed cooperatively by a rhodium complex and zinc chloride
作者:Jialin Ming、Qi Shi、Tamio Hayashi
DOI:10.1039/c8sc02459f
日期:——
The reaction of arylstannanes ArSnR3 with unfunctionalised alkynes was found to proceed in the presence of a rhodium catalyst and a catalytic amount of zinc chloride to give ortho-alkenylarylstannanes with high selectivity in high yields. The catalytic cycle is very unique, consisting of three transmetalation steps, from Sn to Rh, Rh to Zn, and Zn to Sn, in addition to arylrhodation of alkyne followed
Reactions of Trialkylstannane Anions R<sub>3</sub>Sn<sup>−</sup>with Arylstannanes ArSnR<sub>3</sub>′
作者:Kunio Mochida
DOI:10.1246/bcsj.60.3299
日期:1987.9
initial tin–alkali metal exchange or an electron-transfer forming aryl anions and distannanes which subsequently react to the substitution products. Aryl radicalintermediates by an electron-transfer process are also important in the reactions of trialkylstannane anions with electron-withdrawing groups-substituted arylstannanes, 1-naphthylstannanes, diphenylstannanes, and triphenylmethylstannane as good
研究了三烷基锡烷阴离子 R3Sn− 与芳基锡烷 ArSnR3' 的反应;三烷基锡烷阴离子与芳基锡烷在 50 °C 下以良好的产率得到取代产物 ArSnR3。当用于捕获游离阴离子的叔丁胺存在于反应混合物中时,这些取代产物中的大多数被转移到还原产物 ArH。这些结果与最初的锡碱金属交换或电子转移形成芳基阴离子和二锡烷一致,随后与取代产物反应。通过电子转移过程产生的芳基自由基中间体在三烷基锡烷阴离子与吸电子基团取代的芳基锡烷、1-萘基锡烷、二苯基锡烷和三苯甲基锡烷作为良好的电子受体底物的反应中也很重要。