(2E)-1-(4-Amino-phen-yl)-3-(2-thien-yl)prop-2-en-1-one ethanol hemisolvate

6-(4-Aminophenyl)-2-ethoxy-4-(2-thienyl)nicotinonitrile

In the title nicotinonitrile derivative, C₁₈H₁₅N₃OS, the central pyridyl ring makes dihedral angles of 25.22 (10) and 24.80 (16)° with the 4-amino­phenyl and thio­phene rings, respectively. The thio­phene ring is disordered over two orientations by rotation around the C(thio­phene)—C(pyridine) bond; the occupancies are 0.858 (2) and 0.142 (2). The eth­oxy group is slightly twisted from the attached pyridyl ring [C—O—C—C torsion angle = 171.13 (16)°]. In the crystal structure, mol­ecules are linked by N—H⋯N hydrogen bonds into chains along [010]. These chains are stacked along the a axis. C—H⋯π weak inter­actions involving the thio­phene ring are observed.