Spiro[cyclopentane-1,2′(1′H)-pyrido[2,3-d]pyrimidin]-4′(3′H)-one

Abstract

The title compound, C11H13N2O, was obtained by cyclocondensation of 2-aminopyridine-3-carbonitrile with cyclopentanone. The molecule is built up from two fused six-membered rings and one five-membered ring linked through a spiro C atom. Both the pyrimidine and the cyclopentane rings adopt envelope conformations. In the crystal structure, molecules are linked by intermolecular N—H...O hydrogen bonds.