Palladium-Mediated Functionalization of Heteroaromatic Cations: Comparative Study on Quinolizinium Cations
作者:Domingo García-Cuadrado、Ana M. Cuadro、Bernardo M. Barchín、Ana Nuñez、Tatiana Cañeque、Julio Alvarez-Builla、Juan J. Vaquero
DOI:10.1021/jo060634+
日期:2006.10.1
cross-coupling reaction on heteroaromatic cations is described. A comparative study of the Stille and Suzuki reactions shows that only the Stille reaction is able to produce an efficient C−C bond formation between any of the four isomeric bromoquinolizinium bromides and a variety of stannanes. In the presence of the catalysts Pd(PPh3)4 or Pd2(dba)3P(o-Tol)3, vinyl, ethynyl, aryl, and heteroaryl groups are
描述了在杂芳族阳离子上有效的钯催化的交叉偶联反应。对Stille和Suzuki反应的比较研究表明,只有Stille反应能够在四种异构的溴喹啉鎓溴化物中的任何一种与各种锡烷之间产生有效的C-C键形成。在催化剂Pd(PPh 3)4或Pd 2(dba)3 P(o- Tol)3的存在下,乙烯基,乙炔基,芳基和杂芳基已在温和的反应条件下以令人满意的收率成功地掺入了喹啉鎓体系中。该方法代表了这类杂芳族阳离子功能上的显着改进。