Microwave-assisted, one-pot reaction of pyridines, -bromoketones and ammonium acetate: An efficient and simple synthesis of Imidazo[1,2- a ]-pyridines
A novel and efficient synthesis of imidazo[1,2-a]pyridines is described. N-Phenacylpyridinium bromides, which were prepared in situ from the addition of pyridines to -bromoketones, undergo nucleophilic addition of ammonium acetate under microwave irradiation and solvent-free conditions to afford the corresponding imidazo[1,2-a]pyridines in excellent yields.
Synthesis and Reaction of Methylbenzoquinolizinium Salts
All isomers of (monomethyl)benzoquinolizinium salts including five new monomethyl derivatives were prepared by photocyclization, sulfur extrusion, or cyclodehydration reaction, and their aldol-type condensation was examined.The 2- and 4-methyl derivati
Arai, Sadao,Yamazaki, Masuo,Hida, Mitsuhiko
p. 1073 - 1078
(2007/10/02)
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