Facile and Efficient Regioselective Synthesis of 1-(3′-Substituted Quinoxalin-2′-yl)-3-aryl/heteroaryl-5-methylpyrazoles
作者:Ranjana Aggarwal、Eakta Masan、Garima Sumran
DOI:10.1080/00397911.2012.674168
日期:2013.7.3
Abstract This report describes an efficient and practical approach for regioselective synthesis of 1-(3′-substituted quinoxalin-2′-yl)-3-aryl/heteroaryl-5-methylpyrazoles (3a–j). Reaction of 2-chloro-3-substituted quinoxalines (1) with 3(5)-methyl-5(3)-aryl-1H-pyrazoles (2) in the presence of sodium hydride furnished the title compounds in excellent yields with good levels of regioselectivity. The
摘要 本报告描述了一种有效且实用的区域选择性合成 1-(3'-取代的喹喔啉-2'-基)-3-芳基/杂芳基-5-甲基吡唑 (3a-j) 的方法。2-氯-3-取代喹喔啉 (1) 与 3(5)-甲基-5(3)-芳基-1H-吡唑 (2) 在氢化钠存在下的反应以优异的收率和良好的水平提供标题化合物区域选择性。本协议优于现有方法,该方法产生了区域异构吡唑 (I、II) 和三唑 [4,3-a] 喹喔啉 (III) 的混合物。补充材料可用于本文。转至出版商的 Synthetic Communications® 在线版以查看免费的补充文件。图形概要