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- Title
Crystal and molecular structure of new tetrahydrobenzo[ e]pyrano[4,3- b]pyridines.
- Authors
Mironova, E. V.; Gubaidullin, A. T.; Murtazina, A. M.; Litvinov, I. A.; Mamedov, V. A.
- Abstract
Three tetrahydrobenzo[ e]pyrano[4,3- b]pyridines formed in a diethyl 2,4,6-trioxoheptanedicarboxylic ether-substituted salicylic aldehyde-ammonium acetate system were studied by single crystal X-ray diffraction. After the introduction of a methoxy group in the tricyclic system, the tetrahydropyridine and pyrane rings adopted the half-chair conformation, while in the unsubstituted compound, the tetrahydropyridine ring has a distorted boat conformation, and the pyrane ring has a C-envelope conformation. In the compounds, the N-H⋯O and O-H⋯O intermolecular hydrogen bonds give rise to the development of chain structures. In two of the three compounds examined, the hydrogen atoms at the chiral centers are in the trans-position, as in the structure of natural tetrahydrocannabinols.
- Subjects
CRYSTALS; HETEROCYCLIC compounds; CHEMICAL structure; NONMETALS; MOLECULAR structure
- Publication
Journal of Structural Chemistry, 2008, Vol 49, Issue 1, p95
- ISSN
0022-4766
- Publication type
Article
- DOI
10.1007/s10947-008-0014-7