Copper-catalyzed synthesis of substituted indazoles from 2-chloroarenes at low catalyst-loading
作者:Shinji Tanimori、Yasuyuki Kobayashi、Yasukazu Iesaki、Yuka Ozaki、Mitsunori Kirihata
DOI:10.1039/c1ob05875d
日期:——
An efficient and convenient access to 1-substituted indazol-3-ones 2 has been achieved throughout the intramolecular C–N bond formations of 2-chloro-benzoic acid-N′-aryl and alkyl-hydrazides employing 0.5 mol% of cuprous (I) iodide and 20 mol% of L-proline as catalyst precursors under mild conditions in moderate to excellent yields.
通过分子内C-N键的形成,利用0.5 mol%的碘化亚铜(I)和20 mol%的L-脯氨酸作为催化前驱体,在温和条件下实现了高效且便捷的1-取代吲唑-3-酮2的合成,产率中等至优异。