Cp*Co(III)-Catalyzed Regioselective [4 + 2]-Annulation of <i>N</i>-Chlorobenzamides with Vinyl Acetate/Vinyl Ketones
作者:Shanmugarajan Jothi Murugan、Masilamani Jeganmohan
DOI:10.1021/acs.joc.2c02640
日期:2023.2.3
An efficient and straightforward strategy for the synthesis of isoquinolones through [4 + 2]-annulation of N-chlorobenzamides with vinyl acetate in the presence of CoCp*(III) catalyst in a regioselective manner is described. Furthermore, the annulation reaction was diversified by using vinyl ketones. By utilizing this strategy, biologically valuable isoquinolone derivatives were prepared in good yields
描述了在CoCp *(III) 催化剂存在下以区域选择性方式通过 [4 + 2]-N-氯苯甲酰胺与乙酸乙烯酯环化合成异喹诺酮的有效且直接的策略。此外,通过使用乙烯基酮使环化反应多样化。通过利用这一策略,以良好的收率制备了具有生物学价值的异喹诺酮衍生物。随后,异喹诺酮衍生物在POCl 3存在下进一步转化为1-氯异喹啉。此外,还进行了氘标记研究和竞争实验等机理研究,以支持所提出的反应机制。