Rh(III)-Catalyzed Oxidative C–H Activation/Annulation of Salicylaldehydes with Masked Enynes for the Synthesis of Chromones
作者:Bo Li、Jianping Zhu、Xia Zheng、Wenqing Ti、Yue Huang、Hequan Yao
DOI:10.1021/acs.joc.2c02557
日期:2023.1.6
A rhodium(III)-catalyzed oxidative C–H activation/annulation of salicylaldehydes with propargylic acetates has been developed for the regioselective synthesis of 3-vinyl chromones in good yields with broad functional group tolerance. 3-Vinyl chromones were converted into biologically active benzo[c]xanthone by I2-mediated oxidative electrocyclization.
已开发出一种铑 (III) 催化的氧化 C-H 活化/水杨醛与炔丙基乙酸酯的环化反应,用于区域选择性合成 3-乙烯基色酮,收率高,具有广泛的官能团耐受性。3-乙烯基色酮通过 I 2介导的氧化电环化作用转化为具有生物活性的苯并[ c ]氧杂蒽酮。