Chemoselective Chromium(II)-Catalyzed Cross-Coupling Reactions of Dichlorinated Heteroaromatics with Functionalized Aryl Grignard Reagents
作者:Andreas K. Steib、Olesya M. Kuzmina、Sarah Fernandez、Sushant Malhotra、Paul Knochel
DOI:10.1002/chem.201405275
日期:2015.1.26
dichloropyridines with a range of functionalized (hetero)aromatic Grignard reagents at room temperature. Functional groups, such as esters and acetals, are well tolerated in this transformation. Previously challenging substrates, quinolines and isoquinolines, participate in the selective Cr‐catalyzed cross‐coupling in cyclopentyl methyl ether (CPME) as the solvent. The effective purging of Cr salts is demonstrated
氯化铬(II)在室温下催化二氯吡啶与一系列功能化(杂)芳族格氏试剂的化学选择性交叉偶联反应。在这种转化过程中,对酯和缩醛等官能团的耐受性良好。以前具有挑战性的底物喹啉和异喹啉在溶剂中以环戊基甲基醚(CPME)参与选择性的Cr催化交叉偶联。通过使用各种固体载体可有效清除Cr盐。