Dimethyl 5,5-Dicyano-2-Hydroxy-4,6-Diphenylcyclohex-1-ene-1,3-Dicarboxylate

Abstract

The molecular structure of C<inf>24</inf>H<inf>20</inf>N<inf>2</inf>O <inf>5</inf>, the cyclohexene rings, was investigated. A series of 4H-pyran and cyclohexanone derivatives were prepared via a three-component reaction of dimethyl acetonedicarboxylate, aromatic aldehydes and malononitrile. The cyclohexene ring adopts a half-cair conformation. The bond lengths and angles are comparable to the corresponding values in methyl 6-amino-5-cyano-2-methoxy- carbonylmethyl-4-phenyl-4H-pyran-3-carboxylate. The crystal structure is stabilized by intra- and intermolecular hydrogen bonds.