title: Ethyl 5-methyl-7-phenyl-1,2,4-triazolo[4,3-a]pyrimidine-6-carboxyl-ate.
abstract: In the title compound, C15H14N4O2, the triazolo-pyrimidine ring system is almost planar (r.m.s. deviation = 0.02 Å) and the phenyl ring is inclined to its mean plane by 42.45 (9)°. The carboxyl group is inclined to the triazolo-pyrimidine ring mean plane by 57.8 (3)°. In the mol-ecule, there is a short C-H⋯O contact involving the carbonyl O atom and an H atom of the adjacent methyl substituent. In the crystal, neighbouring mol-ecules are linked by C-H⋯O hydrogen bonds, forming chains propagating along [010]. There are also weak π-π inter-actions present involving the pyridine and phenyl rings of neighbouring chains [inter-centroid distance = 3.8580 (16) Å].
authors.affiliation: Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Alexandria University, Alexandria 21521, Egypt.
authors.forename: Omaima M
authors.initials: OM
authors.lastname: AboulWafa
authors.affiliation: Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Alexandria University, Alexandria 21521, Egypt.
authors.forename: Ahmed M
authors.initials: AM
authors.lastname: Farghaly
authors.affiliation: Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Alexandria University, Alexandria 21521, Egypt.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Teleb
authors.affiliation: National Institute of Oceanography and Fisheries, Alexandria University, Alexandria 21556, Egypt.
authors.forename: Khaled S
authors.initials: KS
authors.lastname: Sinoussy