Cu(OAc)2–Et3N mediated oxidative coupling of α-azido ketones with pyridinium ylides: utilizing in situ generated imines for regioselective synthesis of imidazo[1,2-a]pyridines
Cu(OAc)2–Et3N mediated oxidative coupling of α-azido ketones with pyridinium ylides: utilizing in situ generated imines for regioselective synthesis of imidazo[1,2-a]pyridines
The synthesis of a library of pyrrolo[1,2-a]quinoline derivatives 4―33 was performed by an efficient one-pot, three-component reaction from quinolines 1a―c, 2-bromoacetophenones 2 and non-symmetrical acetylenic dipolarophiles 3a―c in 1,2-epoxypropane as both reaction medium and HBr scavenger. As this approach was unsuccessful in the case of DMAD, a different method was used for the synthesis of pyrrolo[1
Cu(OAc)<sub>2</sub>–Et<sub>3</sub>N mediated oxidative coupling of α-azido ketones with pyridinium ylides: utilizing in situ generated imines for regioselective synthesis of imidazo[1,2-a]pyridines