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Diethyl 2,6-dimethyl-4-(5-phenyl-1H-pyrazol-4-yl)-1,4-dihydro-pyridine-3,5-dicarboxyl-ate.

ABSTRACT: In the title compound, C(22)H(25)N(3)O(4), the dihydro-pyridine ring adopts a flattened boat conformation. The pyrazole ring makes a dihedral angle of 29.04 (5)° with the benzene ring. The mol-ecular structure is stabilized by an intra-molecular C-H⋯O hydrogen bond which generates an S(9) ring motif. In the crystal, mol-ecules are linked via N-H⋯O and C-H⋯N hydrogen bonds into a two-dimensional network parallel to the ab plane. The crystal structure is further consolidated by weak C-H⋯π inter-actions.

SUBMITTER: Fun HK

PROVIDER: S-EPMC3297939 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Diethyl 2,6-dimethyl-4-phenyl-1,4-dihydro-pyridine-3,5-dicarboxyl-ate.

Project description:The title mol-ecule, C(19)H(23)NO(4), was synthesized by the reaction of benzaldehyde, ethyl acetoacetate and NH(4)HCO(3). The dihydro-pyridine ring adopts a flattened boat conformation and the plane of the base of the boat forms a dihedral angle of 88.78?(9)° with the phenyl ring. The packing is stabilized by strong inter-molecular N-H?O and weak inter-molecular C-H?O hydrogen bonds.

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Diethyl 2,6-dimethyl-4-p-tolyl-1,4-dihydro-pyridine-3,5-dicarboxyl-ate.

Project description:In the title compound, C(20)H(25)NO(4), the 1,4-dihydro-pyridine ring adopts a flattened-boat conformation and forms a dihedral angle of 89.77?(8)° with the benzene ring. Inter-molecular N-H?O hydrogen bonds result in the formation of extended chains parallel to the b axis.

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Dimethyl 2,6-dimethyl-1,4-dihydro-pyridine-3,5-dicarboxyl-ate.

Project description:In the crystal of the title compound, C(11)H(15)NO(4), the mol-ecules are linked into sheets by N-H?O and C-H?O hydrogen bonds. Within the mol-ecule, the 1,4-dihydro-pyridine ring exhibits a distinctive planar conformation [r.m.s. deviation from the mean plane of 0.009?(3)Å], and the other non-H atoms are almost coplanar [r.m.s. deviation = 0.021?(3)?Å] with the 1,4-dihydro-pyridine ring. The conformation of the latter is governed mainly by two intra-molecular C-H?O non-classical inter-actions.

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Diethyl 4-(4-acetamido-phenyl)-2,6-dimethyl-1,4-dihydro-pyridine-3,5-dicarboxyl-ate.

Project description:The title compound, C(21)H(26)N(2)O(5), was unexpectedly obtained as a by-product in the reaction of ethyl acetoacetate, 4-acetamido-benzaldehyde and urea under microwave irradiation. The dihydro-pyridine ring assumes a flattened boat conformation. Inter-molecular N-H⋯O and weak C-H⋯O hydrogen bonding occurs in the crystal.

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Diethyl 4-[4-(dimethyl-amino)phen-yl]-2,6-dimethyl-1,4-dihydro-pyridine-3,5-dicarboxyl-ate.

Project description:In the title compound, C(21)H(28)N(2)O(4), the dihydro-pyridine ring adopts a flattened boat conformation. The mean plane of the dihydro-pyridine ring and the attached benzene ring form a dihedral angle of 85.1?(1)?Å. One of two ethyl fragments is disordered between two conformations in a 0.67?(4):0.33?(4) ratio. In the crystal structure, mol-ecules related by translation along the a axis are linked into chains via inter-molecular N-H?O hydrogen bonds.

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Diethyl 4-(4-cyano-phen-yl)-2,6-dimethyl-1,4-dihydro-pyridine-3,5-dicarboxyl-ate.

Project description:In the title compound, C(20)H(22)N(2)O(4), the dihedral angle between the roughly planar dihydro-pyridine ring (r.m.s. deviation = 0.092?Å) and the benzene ring is 87.09?(6)°. One of the eth-oxy side chains is disordered over two orientations in a 0.669?(14):0.331?(14) ratio. In the crystal, mol-ecules are linked by N-H?N hydrogen bonds, generating chains.

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Diethyl 4-(4-ethoxy-phen-yl)-2,6-dimethyl-1,4-dihydro-pyridine-3,5-dicarboxyl-ate.

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Diethyl 4-[5-(4-chloro-phen-yl)-1H-pyrazol-4-yl]-2,6-dimethyl-1,4-dihydro-pyridine-3,5-dicarboxyl-ate.

Project description:In the title compound, C(22)H(24)ClN(3)O(4), intra-molecular C-H?O and C-H?N hydrogen bonds form S(9) and S(7) ring motifs, respectively. The 1,4-dihydro-pyridine ring adopts a flattened boat conformation. The benzene ring makes a dihedral angle of 33.36?(6)° with the pyrazole ring. In the crystal, pairs of N-H?N hydrogen bonds link the mol-ecules into inversion dimers. The dimers are stacked in column along the a axis through N-H?O and C-H?N hydrogen bonds. The crystal packing also features C-H?? inter-actions involving the pyrazole ring.

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Diethyl 4-[5-(biphenyl-4-yl)-1H-pyrazol-4-yl]-2,6-dimethyl-1,4-dihydro-pyridine-3,5-dicarboxyl-ate ethanol monosolvate.

Project description:In the title compound, C(28)H(29)N(3)O(4)·C(2)H(6)O, the benzene ring makes dihedral angles of 33.72?(13) and 32.86?(13)°, respectively, with the adjacent pyrazole and phenyl rings. In the crystal, the components are connected via inter-molecular N-H?O, N-H?N, O-H?O and C-H?O hydrogen bonds, forming a layer parallel to the bc plane.

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Dimethyl 4-(3,4-dimethoxy-phen-yl)-2,6-dimethyl-1,4-dihydro-pyridine-3,5-dicarboxyl-ate.

Project description:In the title compound, C(19)H(23)NO(6), the 1,4-dihydro-pyridine ring is twisted slightly from planarity, with a maximum deviation of 0.101?(1)?Å, and adopts a very flattened boat conformation. The dihedral angle formed between the plane through the four C atoms of the 1,4-dihydro-pyridine ring and the benzene ring is 84.67?(7)°. In the crystal structure, inter-molecular N-H?O and C-H?O hydrogen bonds link the mol-ecules into a three-dimensional network.

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