Z. S. Salih, P. Stegmueller, W. Pfleiderer
Sep 1, 1988
Citations
0
Influential Citations
7
Citations
Journal
Journal of Heterocyclic Chemistry
Abstract
Acylations of 1,3-dimethyl- (1) and 1,3,7-trimethylpyrrolo[2,3-d]pyrimidine-2,4-dione (2) with anhydrides in the presence of trifluoroacetic acid proceed well to give in good yields the corresponding 7-acyl derivatives 3–11. The 6-trichloroacetyl derivatives 5 and 6 are sensitive towards nucleophiles, which displace the trichloromethyl group easily by formation of the corresponding 6-carboxylic acid derivatives 12–23. The newly synthesized compounds have been characterized by elemental analysis, uv and 1H nmr spectra and pKa, determinations.