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

ABSTRACT: In the title compound, C(18)H(21)NO(5), the dihydro-pyridine ring adopts a flattened-boat conformation and its planar part forms a dihedral angle of 84.60?(2)° with the benzene ring. In the crystal, inter-molecular N-H?O and C-H?O hydrogen bonds result in the formation of zigzag layers parallel to (001). These layers are inter-connected via C-H?? inter-actions.

SUBMITTER: Loh WS

PROVIDER: S-EPMC2983583 | biostudies-literature | 2010 Feb

REPOSITORIES: biostudies-literature

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

Loh Wan-Sin WS Fun Hoong-Kun HK Reddy B Palakshi BP Vijayakumar V V Sarveswari S S

Acta crystallographica. Section E, Structure reports online 20100213 Pt 3

In the title compound, C(18)H(21)NO(5), the dihydro-pyridine ring adopts a flattened-boat conformation and its planar part forms a dihedral angle of 84.60 (2)° with the benzene ring. In the crystal, inter-molecular N-H⋯O and C-H⋯O hydrogen bonds result in the formation of zigzag layers parallel to (001). These layers are inter-connected via C-H⋯π inter-actions. ...[more]

PMID: 21580352

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

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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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Project description:The title mol-ecule, C(17)H(19)NO(5), was prepared by a Hantzsch dihydro-pyridine synthesis from 4-hy-droxy-benzaldehyde, methyl acetoacetate and NH(4)HCO(3). In the mol-ecular structure of the title compound, the dihydro-pyridine ring adopts a flattened boat conformation and the plane of the base of the boat forms a dihedral angle of 80.8?(2)° with the aromatic six-membered ring. The packing is stabilized by strong inter-molecular N-H?O(carbon-yl), O(hydrox-y)-H?O(carbon-yl) and weak intra-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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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 2,6-dimethyl-4-[4-(3-phenyl-acrylo-yloxy)phen-yl]-1,4-dihydro-pyridine-3,5-dicarboxyl-ate hemihydrate.

Project description:In the title ester derivative, C28H29NO6·0.5H2O, the 1,4-dihydro-pyridine ring has a flattened boat conformation. The mean plane is almost perpendicular to the attached benzene ring, making a dihedral angle of 86.87?(9)°. The terminal phenyl ring is inclined to the central benzene ring by 67.56?(12)°. In the crystal, mol-ecules are bridged via O-H?O hydrogen bonds involving the partially occupied water mol-ecule, and this arrangement is strengthened by a pair of N-H?O hydrogen bonds and C-H?O inter-actions. The ethyl atoms of one of the ethyl ester groups are disordered over two sites with an occupancy ratio of 0.716?(5):0.284?(5).

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