title: 2,2-Dimethyl-2,3-dihydro-pyrano[2,3-a]carbazol-4(11H)-one.
abstract: The title compound, C(17)H(15)NO(2), was prepared from 1-hydroxy-carbazole and 3,3-dimethyl-acrylic acid with a mixture of AlCl(3) and POCl(3) as the cyclization catalyst. Owing to the presence of the -CMe(2)- group, the mol-ecule is not quite planar. In the crystal structre, strong N-H⋯O hydrogen bonds and weaker C-H⋯π inter-actions occur, and a slipped π-π stacking inter-action [centroid-centroid separation = 3.8425 (8) Å] is also observed.
authors.forename: Makuteswaran
authors.initials: M
authors.lastname: Sridharan
authors.forename: Karnam J Rajendra
authors.initials: KJ
authors.lastname: Prasad
authors.forename: Aimable
authors.initials: A
authors.lastname: Ngendahimana
authors.forename: Matthias
authors.initials: M
authors.lastname: Zeller