B. Stanovnik, Urška Bratušek, S. Rečnik
May 1, 2003
Citations
0
Influential Citations
3
Citations
Journal
Heterocycles
Abstract
Methyl 2-benzoylamino-2-oxobutanoate (1) was transformed with aromatic amines (2a-d) into methyl 2-arylamino-2-(benzoylamino)but-2-enoates (3a-d) Cyclization of compounds (3a-c) in polyphosphoric acid affords a mixture ofoxazolo[4,5-c]quinoline derivatives (4a-c) and 1 -aryl-2-phenyl-5-methyl- 1H-imidazole-4-carboxylates (5a-c), while compound 3d gives a mixture of 9-bromo- (4d) and 7-bromooxazolo[4,5-c]quinoline derivative (4d').