242481-20-5Relevant articles and documents
Utility of 2-amino-4,5,6,8-tetrahydro-7H-chromene-3-carbonitriles in synthesis of chromeno[2,3-d]pyrimidine and chromeno[3,2-e] [1,2,4]triazolo[1,5-c]pyrimidine derivatives of pharmaceutical interest
Hassanien,Zahran,El-Gaby,Ghorab
, p. 350 - 354 (2007/10/03)
Chromeno[2,3-d]pyrimidines (5, 6 and 8) have been prepared by the reaction of 2-amino-7,7-dimethyl-4-substitutedphenyl-5-oxo-4,5,6,8-tetrahydro-7H-chromene-3- carbonitriles (2a,b) with formic acid, form amide and phenyl isothiocyanate respectively. The reaction of 3-amino-4-iminochromeno[2,3-d]pyrimidine (11) with formic acid, acetic anhydride and p-chlorobenzaldehyde have furnished the chromeno[3,2-e][1,2,4]triazolo[1,5-c]pyrimidines (12, 14 and 15) respectively.