金属依赖的第 4 族元素上取代的锡基和烷基炔烃的区域选择性同型偶联。不对称钛杂环戊二烯和对称锆杂环戊二烯的形成。
Metal-dependent regioselective homocoupling of stannyl- and alkyl-substituted alkynes on group 4 elements. Formation of unsymmetrical titanacyclopentadienes and symmetrical zircona-cyclopentadienes.
机构信息
Institute for Catalysis and Graduate School of Life Science, Hokkaido University, Sapporo, Hokkaido 001-0021, Japan.
Department of Chemistry, Aichi University of Education, Igaya, Kariya, Aichi 448-8542, Japan.
出版信息
Dalton Trans. 2019 Oct 7;48(37):13912-13915. doi: 10.1039/c9dt02759a. Epub 2019 Sep 5.
Homocoupling of stannyl- and alkyl-substituted alkynes with CpTiBu gave unsymmetrical titanacyclopentadienes (αβ isomers) with >95% regioselectivities, whereas the coupling with CpZrBu provided symmetrical zirconacyclopentadienes (αα isomers) with >93% selectivities. This is the first example of metal-dependent regioselective homocoupling of unsymmetrical alkynes on group 4 elements.
芳基锡和烷基取代的炔烃与 CpTiBu 的偶联以大于 95%的区域选择性生成不对称的钛杂环戊二烯（αβ 异构体），而与 CpZrBu 的偶联则以大于 93%的选择性提供对称的锆杂环戊二烯（αα 异构体）。这是首例关于第 4 族元素上不对称炔烃的金属依赖性区域选择性同偶联的实例。
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