Acta Cryst. (2005). E61, o461-o463  [ doi:10.1107/S1600536805002448 ]

A diastereoisomer of pyrano[3,2-c]quinoline

K. Ravikumar, B. Sridhar, M. Mahesh and V. V. N. Reddy

Abstract: The title compound, 5-(4-nitrophenyl)-3,4,4a,5,6,10b-hexahydro-2H-pyrano[3,2-c]quinoline, C₁₈H₁₈N₂O₃, was obtained from the Diels-Alder reaction of N-benylideneaniline and dihydropyran, catalyzed by zirconium tetrachloride. This molecule is an exo-cycloadduct isomer. The pyran ring adopts a chair conformation, while the N-heterocyclic ring prefers a half-chair conformation. Molecules are associated into centrosymmetric dimers by N-HO hydrogen bonds.

Online 29 January 2005

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