Bis(triphenylstannyl) thiophene-2,5-dicarboxylate

Dimethyl 3,3′-diphenyl-2,2′-[(S)-thiophene-2,5-diylbis(carbonylazanediyl)]dipropanoate tetrahydrofuran monosolvate

The title compound, C₂₆H₂₆N₂O₆S·C₄H₈O, a solvated bis-amide derivative, is also a chiral amino acid ester with l-phenyl­alanine methyl ester groups as amine substituents. The thio­phene-2,5-dicarboxamide core approximates C₂ point symmetry. The tetra­hydro­furan solvent mol­ecule is linked to the main mol­ecule through an inter­molecular N—H⋯O hydrogen bond. The central ring makes dihedral angles of 90.0 (2) and 76.5 (2)° with the pendant rings.

5-(Methoxy-carbon-yl)thio-phene-2-carboxylic acid

In the title compound, C(7)H(6)O(4)S, a monoester derivative of 2,5-thio-phene-dicarboxylic acid, the carboxylic acid and the carboxylic acid ester groups are approximately coplanar with thio-phene ring, making a dihedral angle of 3.1 (4) and 3.6 (4)°, respectively. In the crystal structure, mol-ecules are connected by classical inter-molecular O-H⋯O hydrogen bonds, forming centrosymmetric dimers.