Cobalt(III)-Catalyzed Regioselective [4 + 2]-Annulation of <i>N</i>-Chlorobenzamides with Substituted Alkenes
作者:Suresh Kumar Yadav、Masilamani Jeganmohan
DOI:10.1021/acs.joc.2c01588
日期:2022.10.7
Co(III)-catalyzed redox-neutral [4 + 2] annulation of N-chlorobenzamides/acrylamides with substituted alkenes at ambient temperature is demonstrated. Using this protocol, pharmaceutically important 3,4-dihydroisoquinolinone derivatives were synthesized in good yields. Intriguingly, the synthetically useful functional group of allylic coupling partners such as sulfonyl, carbonate, acetate, phosphate, amide
证明了在环境温度下, N-氯苯甲酰胺/丙烯酰胺与取代烯烃的 Co(III) 催化氧化还原中性 [4 + 2] 环化。使用该协议,药学上重要的 3,4-二氢异喹啉酮衍生物以良好的收率合成。有趣的是,合成有用的烯丙基偶联配对官能团(如磺酰基、碳酸酯、乙酸酯、磷酸酯、酰胺、腈和硅烷)保留在最终的环化产物中。本发明的环化反应与各种取代的苯甲酰胺和烯丙基偶联配偶体相容。为了支持所提出的反应机制,进行了竞争实验、氘标记研究和动力学同位素效应研究。