Journal of Organic Chemistry p. 5763 - 5768 (1989)
Update date:2022-08-05
Topics:
Alcaide, Benito
Plumet, Joaquin
Sierra, Miguel A.
Vicent, Cristina
The reaction of some arylglyoxals with a variety of 2-amino heterocycles, including pyridine, diazine, and azole derivatives, has been studied, with or without BF3*Et2O complex as catalyst.On the basis of the isolation of different intermediate carbinolamines and of some crossover cyclization experiments, a reasonable mechanism has been proposed for all these processes.In addition, some structural features of the resulting bicyclic imidazo<1,2-a> derivatives having a potential hydroxyl group in position 3 are discussed.
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