Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 7 (July 2013)

organic compounds

Acta Cryst. (2013). E69, o1116-o1117    [ doi:10.1107/S1600536813016474 ]

Ethyl 2-[(2-hy­droxy­benzyl­idene)amino]-6-methyl-4,5,6,7-tetra­hydro­thieno[2,3-c]pyridine-3-carboxyl­ate

N. Çolak, D. A. Köse, N. Marim, Ö. Çelik and T. Hökelek

Abstract: The title compound, C18H20N2O3S, exists as the phenol-imine form in the crystal and there are bifurcated intra­molecular O-H...(N/O) hydrogen bonds present. The conformation about the C=N bond is anti (1E); the C=N imine bond length is 1.287 (4) Å and the C=N-C angle is 122.5 (3)°. In the tetrahydrothienopyridine moiety, the six-membered ring has a flattened-boat conformation. In the crystal, mol­ecules are stacked nearly parallel to (110) and a weak C-H...[pi] inter­action is observed. The carbonyl O atom is disordered over two positions and was refined with a fixed occupancy ratio of 0.7:0.3.

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