Direct Synthesis of Benzo[<i>f</i>]indazoles from Sulfonyl Hydrazines and 1,3-Enynes by Copper-Catalyzed Annulation
作者:Biao Yao、Tao Miao、Pinhua Li、Lei Wang
DOI:10.1021/acs.orglett.8b03564
日期:2019.1.4
A novel and efficient strategy for the direct synthesis of benzo[f]indazoles via copper-catalyzed cascade reaction of sulfonyl hydrazides with 1,3-enynes under mild conditions has been developed. This method achieves the formation of two C–N bonds and one C–C bond in one pot, providing a series of benzo[f]indazoles in moderate to good yields with good functional group tolerance and remarkable regioselectivity
提出了一种在温和条件下通过磺酰肼与1,3-烯炔的铜催化级联反应直接合成苯并[ f ]吲唑的新颖有效策略。此方法可在一锅中形成两个C–N键和一个C–C键,从而以中等至良好的收率提供了一系列苯并[ f ]吲唑,并具有良好的官能团耐受性和显着的区域选择性。