Indium-Catalyzed 2-Alkenylation of 1,3-Dicarbonyl Compounds with Unactivated Alkynes
作者:Kohei Endo、Takuji Hatakeyama、Masaharu Nakamura、Eiichi Nakamura
DOI:10.1021/ja0702014
日期:2007.4.1
the position of C-C bond formation on the acetylene moiety. In most of the cases, the reaction requires less than 1-mol % loading of the catalyst and does not require solvent. The reaction tolerates a wide variety of functional groups including ester, ether, allylic halide, furan, thiophene, and protected amine. Experimental and theoretical studies suggested that the reaction proceeds via a concerted
在催化量的三氟甲磺酸铟 (III) 存在下,1,3-二羰基化合物以高产率添加到未活化的炔烃中,得到 2-烯基化的 1,3-二羰基化合物,对 CC 键形成的位置具有独特的区域选择性在乙炔部分。在大多数情况下,反应需要小于 1 mol% 的催化剂负载并且不需要溶剂。该反应耐受多种官能团,包括酯、醚、烯丙基卤、呋喃、噻吩和受保护的胺。实验和理论研究表明,该反应通过铟 (III) 烯醇化物与乙炔的协同碳金属化反应进行,其中铟-乙炔相互作用很重要。