Highly Efficient and Direct Heterocyclization of Dipyridyl Ketone to N,N-Bidentate Ligands
摘要:
Reaction of various aromatic aldehydes with 2,2'-dipyridyl ketone and ammonium acetate in hot acetic acid provides ready access to a series of substituted 1-pyridylimidazo[1,5-a]pyridines, a class of ligands possessing an N,N-bidentate feature, in good yields.