title: 5-Amino-7-(3-chloro-phen-yl)-3,7-di-hydro-2H-thieno[3,2-b]pyran-6-carbo-nitrile 1,1-dioxide.
abstract: The title compound, C(14)H(11)ClN(2)O(3)S, with fused thiophene and pyran rings, was synthesized via the condensation of dihydro-thio-phen-3(2H)-one 1,1-dioxide and 2-(3-chloro-benz-yl-idene)malononitrile catalysed by triethyl-amine in ethanol. The thio-phene ring adopts an envelope conformation and the pyran ring is planar (r.m.s. deviation = 0.0067 Å). The dihedral angle between the pyran and phenyl rings is 80.8 (1)°. The crystal packing is stabilized by inter-molecular N-H⋯N and N-H⋯O hydrogen bonds in which the cyano N and sulphone O atoms, respectively, acting as acceptors.
authors.forename: Shi-De
authors.initials: SD
authors.lastname: Shen
authors.forename: Xiao-Dong
authors.initials: XD
authors.lastname: Feng
authors.forename: Wei-Hua
authors.initials: WH
authors.lastname: Yang
authors.forename: Cui-Hua
authors.initials: CH
authors.lastname: Wang
authors.forename: Chang-Sheng
authors.initials: CS
authors.lastname: Yao