区域选择性高:已开发了咪唑并[1,2- b ]吡唑核的有效合成方法,并描述了第一个区域选择性钯催化的C-3位置的直接芳基化反应(参见方案)。对于具有富电子和贫电子取代基的各种芳基配偶,均获得了良好或优异的收率。这种方法可以快速获得各种咪唑并[1,2- b ]吡唑产品,并为新的生物活性化合物的设计开辟了道路。
Efficient C-7 or C-3/C-7 Direct Arylation of Tri- or Disubstituted Imidazo[1,2-b]pyrazoles
作者:Gérald Guillaumet、Sandrine Grosse、Christelle Pillard、Philippe Bernard
DOI:10.1055/s-0033-1339657
日期:——
method of C-7 directarylation of the imidazo[1,2- b ]pyrazole core, never described to date, is presented in this paper. Series of electron-rich or electron-poor aryl and heteroaryl groups were easily introduced. The corresponding products were obtained in moderate to excellent yields thanks to this pallado-catalyzed and microwave-assisted process. A one-pot double C-3 and C-7 directcoupling is also