T. Honda, I. Fujii, N. Hirayama
Feb 15, 1996
Citations
1
Influential Citations
5
Citations
Journal
Acta Crystallographica Section C-crystal Structure Communications
Abstract
A new form of the title compound, ethyl 2,3,6,7-tetrahydro-11-oxo-1H,5H,11H-[1]benzopyrano[6,7,8-ij] -quinolizine-10-carboxylate, C 18 H 19 NO 4 , was recrystallized from ethanol and is orange in colour. The coumarin moiety is planar and the conformation of the ethoxycarbonyl group is different from that of the yellow form. One of the piperidine rings is disordered and the N atom is in a planar configuration. The crystal packing is governed by van der Waals interactions.