title: Ethyl 5-amino-3-(4,6-dimethylpyrimidin-2-ylamino)-1-methyl-1H-pyrazole-4-carboxylate and ethyl 5-amino-3-(4,6-dimethylpyrimidin-2-ylamino)-1-(2-nitrophenylsulfonyl)-1H-pyrazole-4-carboxylate.
abstract: The molecular structures of ethyl 5-amino-3-(4,6-dimethylpyrimidin-2-ylamino)-1-methyl-1H-pyrazole-4-carboxylate, C13H18N6O2, (I), and ethyl 5-amino-3-(4,6-dimethylpyrimidin-2-ylamino)-1-(2-nitrophenylsulfonyl)-1H-pyrazole-4-carboxylate, C18H19N7O6S, (II), have been determined. There are two intramolecular N-H...O bonds and one intermolecular N-H...O hydrogen bond in (I). The rings formed by the N-H...O hydrogen bonds are almost planar. In (II), three intramolecular N-H...O hydrogen bonds exist.
authors.affiliation: State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China. wuchao@mail.nankai.edu.cn
authors.forename: Chao
authors.initials: C
authors.lastname: Wu
authors.forename: You Quan
authors.initials: YQ
authors.lastname: Zhu
authors.forename: Hua Bin
authors.initials: HB
authors.lastname: Li
authors.forename: Jian Rong
authors.initials: JR
authors.lastname: Li
authors.forename: Xue Ling
authors.initials: XL
authors.lastname: Ren
authors.forename: Bin
authors.initials: B
authors.lastname: Li
authors.forename: Hua Zheng
authors.initials: HZ
authors.lastname: Yang
mesh_terms: D002264:Carboxylic Acids / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008958:Models, Molecular; D008968:Molecular Conformation; D009574:Nitro Compounds / Q000737:chemistry*; D011720:Pyrazoles / Q000737:chemistry*; D011743:Pyrimidines / Q000737:chemistry*
chemical_list: D002264:Carboxylic Acids; D009574:Nitro Compounds; D011720:Pyrazoles; D011743:Pyrimidines; C510210:ethyl 5-amino-3-(4,6-dimethylpyrimidin-2-ylamino)-1-methyl-1H-pyrazole-4-carboxylate; C510211:ethyl-5-amino-3-(4,6-dimethylpyrimidin-2-ylamino)-1-(2-nitrophenylsulfonyl)-1H-pyrazole-4-carboxylate