Ru(II)-Catalyzed Synthesis of Fused Imidazo[1,2-<i>a</i>]pyridine-chromenones and Methylene-Tethered Bis-imidazo[1,2-<i>a</i>]pyridines and Regioselective O-Acetoxylation of Imidazo[1,2-<i>a</i>]pyridines
作者:Javeed Ahmad Tali、Ravi Shankar
DOI:10.1021/acs.orglett.3c00578
日期:2023.5.12
unprecedented protocol via ruthenium-catalyzed annulation for the synthesis of 6H-chromeno[4′,3′:4,5]imidazo[1,2-a]pyridin-6-one, and functionalized 2-(3-formylimidazo[1,2-a]pyridin-2-yl)phenyl acetate has been revealed by intramolecular chelation-assisted C–H activation. Additionally, a one-pot approach for creating bis(2-phenylimidazo[1,2-a]pyridin-3-yl)methane (BIP) has been realized through ruthenium
在此,我们公开了一种前所未有的通过钌催化环化合成 6 H -chromeno[4',3':4,5]imidazo[1,2- a ]pyridin-6-one 和功能化 2-(已通过分子内螯合辅助的 C-H 活化揭示了3-甲酰咪唑并 [1,2- a ] 吡啶-2-基) 乙酸苯酯。此外,通过使用甲酸的钌催化,已经实现了用于产生双(2-苯基咪唑并[1,2- a ]吡啶-3-基)甲烷(BIP)的一锅法。该方法用于 BIP 的克级合成和已上市药物佐利米丁的经济步骤后期功能化,收率良好。