K<sub>2</sub>CO<sub>3</sub>-Catalyzed Dual C–C-Coupled Cyclization to 3-Amino-4-benzoylbiphenyls and In Situ I<sub>2</sub>-Catalyzed C–N Bond Forming Annulation: A Metal-Free Synthesis of Arylacridones
作者:Aranya Das、Sudipto Debnath、Poulami Hota、Tuluma Das、Dilip K. Maiti
DOI:10.1021/acs.joc.3c01010
日期:2023.9.15
cyclization catalysis reactions are developed in a highly regioselective fashion to synthesize 3-amino-4-benzoyl biphenyls and arylacridones with high atom economy. Catalytic K2CO3 is utilized as the only reagent for the unusual rapid dual C–C-coupled cyclization between β-keto enamines and cinnamaldehydes to furnish the functionalized biphenyls. Its C(sp2)–H functionalized C–N bond-forming cyclization was
以高度区域选择性的方式开发了前所未有的无金属环化催化反应,以合成具有高原子经济性的3-氨基-4-苯甲酰联苯和芳基吖啶酮。催化 K 2 CO 3被用作 β-酮烯胺和肉桂醛之间异常快速的双 C-C 偶联环化的唯一试剂,以提供官能化联苯。使用分子 I 2作为催化剂,其 C(sp 2 )–H 官能化 C–N 键形成环化反应原位进行,以提供有价值的芳基吖啶酮。通过进行各种对照实验和 ESI-MS 分析,预测了新环化反应的合理机制。