title: Ethyl 2-amino-4-phenyl-4H-1-benzo-thieno[3,2-b]pyran-3-carboxyl-ate.
abstract: The title heterocyclic compound, C(20)H(17)NO(3)S, was synthesized by condensation of ethyl cyano-acetate with (Z)-2-benzyl-idenebenzo[b]thio-phen-3(2H)-one in the presence of a basic catalyst in ethanol. The phenyl and ester groups make dihedral angles of 77.67 (6) and 8.52 (6)°, respectively, with the benzothienopyran ring system [maximum r.m.s. deviation = 0.1177 (13) Å]. In the crystal, centrosymmetric dimers are formed through pairs of N-H⋯O hydrogen bonds between the amine and ester groups. Inter-molecular C-H⋯N hydrogen bonds and C-H⋯π inter-actions involving the thio-phene ring are also observed.
authors.forename: Adil
authors.initials: A
authors.lastname: Boughaleb
authors.forename: Hafid
authors.initials: H
authors.lastname: Zouihri
authors.forename: Said
authors.initials: S
authors.lastname: Gmouh
authors.forename: Abdelali
authors.initials: A
authors.lastname: Kerbal
authors.forename: Mohamed
authors.initials: M
authors.lastname: El Yazidi
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677
references.citation: Acta Crystallogr D Biol Crystallogr. 2009 Feb;65(Pt 2):148-55
references.pmid: 19171970