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Ethyl 1-aminona-phtho[2,1-b]furan-2-carboxyl-ate.

ABSTRACT: In the title compound, C(15)H(13)NO(3), there is intra-molecular N-H⋯O hydrogen bond between the amino group and the ester carbonyl O atom and the dihedral angle between the aromatic ring and the ester group is 2.05 (15)°. In the crystal, mol-ecules are connected by N-H⋯O hydrogen bonds into chains parallel to [010]. In addition there are short C-H⋯O inter-actions and π-π stacking inter-actions with a distance of 3.555 (2) Å between the centroids of the furan and benzene rings.

SUBMITTER: Madan KS

PROVIDER: S-EPMC3393926 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Ethyl 5-bromo-naphtho-[2,1-b]furan-2-carboxyl-ate.

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Project description:The title chiral compound, C(14)H(16)N(2)O(2), was prepared by esterification of (S)-1,2,3,9-tetra-hydro-pyrrolo[2,1-b]quinazol-in-1-carboxylic acid in the presence of HCl/EtOH. In the mol-ecule, the quinazoline ring is non-planar and exhibits a distorted half-chair conformation, while the five-membered ring shows a typical envelope conformation. Inter-molecular C-H⋯N hydrogen bonding helps to stabilize the crystal structure.

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Project description:In the title compound, C(21)H(19)NO(2), the six-membered heterocycle assumes a screw-boat conformation. The phenyl ring is oriented with respect to the pyrrole ring at a dihedral angle of 64.76 (10)°. An intra-molecular C-H⋯O hydrogen bond helps to stabilize the mol-ecular structure. There are weak C-H⋯π inter-actions between inversion-related mol-ecules in the crystal.

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Project description:In the title compound, C(20)H(19)NO(5), the dihydro-furan ring is almost planar [maximum deviation of 0.021 (2)°] and makes dihedral angles of 28.1 (7) and 54.5 (5)° with the benzyl and phenyl-amino rings, respectively. The mol-ecular packing is stabilized by intra-molecular N-H⋯O hydrogen bonds and inter-molecular C-H⋯O inter-actions.

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Ethyl 4-(furan-2-yl)-6-methyl-2-oxo-1,2,3,4-tetra-hydro-pyrimidine-5-carboxyl-ate.

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Project description:In the title carboxyl-ate derivative, C11H5N3O9, the picryl ring forms an angle of 75.79?(7)° with the ester fragment, indicating a near perpendicular disposition. The nitro substituents are variously oriented with respect to the picryl ring [dihedral angles = 3.22?(10), 16.03?(12) and 36.63?(10)°]. In the crystal, mol-ecules form helical chains sustained by C-H?O inter-actions along [010]. The furanyl residue is disordered, having two coplanar slightly displaced orientations [major component = 0.730?(9)].

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Ethyl 6-(4-ethoxy-phen-yl)-4-(furan-2-yl)-2-oxocyclo-hex-3-ene-1-carboxyl-ate.

Project description:The title compound, C(21)H(22)O(5), was prepared by NaOH-catalysed cyclo-condensation of 3-(4-ethoxy-phen-yl)-1-(furan-2-yl)prop-2-en-1-one with ethyl acetoacetate. In the crystal, C-H⋯O and C-H⋯π inter-actions link the mol-ecules. In the title mol-ecule, the furan and cyclo-hexene rings are almost parallel [6.77 (11)°] and the cyclo-hexene ring is approximately perpendicular to the benzene ring [84.79 (5)°].

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Ethyl 3,7-dichloro-quinoline-8-carboxyl-ate.

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