Ethyl 2-(3-oxo-1,2,3,4-tetrahydroquinoxalin-2-yl)acetate

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Ethyl 3-oxo-2-(2-phenyl­hydrazinyl­idene)butano­ate: a re-determination

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Both independent mol-ecules in the asymmetric unit of the tautomeric title compound, C(14)H(13)NO(3), a synthetic product obtained from 2-lithio-methyl-quinoline and diethyl oxalate, crystallize in the enaminone form with a Z configuration around the double bond. Intra-molecular N-H⋯O hydrogen bonds occur, generating an S(6) graph-set motif. In the crystal, weak inter-molecular C-H⋯O and π-π st...

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There are two independent mol-ecules in the asymmetric unit of the title compound, C16H15NO3S2, in which the pyrrolidine rings adopt envelope conformations, with a methyl-ene C atom as the flap. The dihedral angles betweeen the near-planar 2H-chromene ring systems [maximum deviations = 0.0167 (20) and 0.0136 (19) Å] and the pyrrolidine rings (all atoms) are 83.83 (11) and 82.43 (11)°. In the cr...

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Ethyl N-(2-benzoyl-3-oxo-3-phenyl­propano­yl)carbamate

In the title compound, C(19)H(17)NO(5), the dihedral angle between the phenyl groups is 79.55 (15)°. The terminal eth-oxy group is disordered over two orientations in a 0.873 (6):0.127 (6) ratio. In the crystal, mol-ecules are linked by N-H⋯O and C-H⋯O hydrogen bonds into [001] chains which incorporate R(1) (2)(6) loops. A very weak C-H⋯π contact also occurs.

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ژورنال

عنوان ژورنال: IUCrData

سال: 2018

ISSN: 2414-3146

DOI: 10.1107/s2414314618005965