Rh-Catalyzed [4 + 2] Annulation with a Removable Monodentate Structure toward Iminopyranes and Pyranones by C–H Annulation
作者:Leiqing Fu、Wenqiang Xu、Maoping Pu、Yun-Dong Wu、Yunyun Liu、Jie-Ping Wan
DOI:10.1021/acs.orglett.2c00912
日期:2022.4.29
The Rh-catalyzed reactions of N-pyridinyl enaminones with internal alkynes leading to the synthesis of iminopyranes via a keyC–Hbondactivation and subsequent tautomeric O–H bond cleavage are reported. Moreover, the pyridine ring in the amino group acts as an auxiliary monodentate site for this annulation and can be easily removed by a simple hydrolysis to afford pyranones.