Ligand-Controlled Cross-Dimerization and -Trimerization of Alkynes under Nickel Catalysis
作者:Naoto Matsuyama、Hayato Tsurugi、Tetsuya Satoh、Masahiro Miura
DOI:10.1002/adsc.200800399
日期:2008.10.6
a pyridine-based ligand efficiently proceeds to give the corresponding enyne compound with good yield. In contrast, their 1:2 cross-trimerization leading to a dienyne derivative takes place selectively using a triarylphosphine ligand. The regioselective cross-dimerization of some unsymmetrical internal arylalkynes with terminal silylacetylenes is also accomplished using the pyridine ligand.
在催化量的双(环辛二烯)镍[Ni(cod)2 ]和吡啶基配体的存在下,通过CH键裂解二苯乙炔与三甲基甲硅烷基乙炔的交叉二聚反应有效地进行,从而以高收率得到了相应的烯炔化合物。相反,使用三芳基膦配体选择性地进行它们的导致二烯炔衍生物的1:2交叉三聚。使用吡啶配体也可以实现一些不对称的内部芳基炔烃与末端甲硅烷基乙炔的区域选择性交叉二聚。