Structure of two 1,3-dioxane derivatives from 4′, 5′-dimethylfurocoumarins: 4a, 11a-dihydro-4a, 11a-dimethyl-8H-pyrano[3′,2′∶5,6]benzofuro[3,2-e]-1, 3-dioxan-8-one and 7a,11a-dihydro-7a,11a-dimethyl-2H-pyrano[2′, 3′∶4,5]benzofuro[3,2-d] (1,3) dioxan-2-one
✍ Scribed by A. Guiotto; G. Bandoli; P. Manzini; P. Rodighiero
- Publisher
- Springer
- Year
- 1987
- Tongue
- English
- Weight
- 786 KB
- Volume
- 17
- Category
- Article
- ISSN
- 1572-8854
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
The molecule of the title compound, C~26~H~30~N~2~O~4~S, adopts a folded conformation, with the sulfonyl-bound benzene ring lying over the pyridinone ring [centroid-to-centroid distance = 3.893 (1) Å], forming a dihedral angle of 23.87 (5)°. The pyrrolidine ring adopts a twist conformation and the d
The asymmetric unit of the title compound, C 26 H 30 N 2 O 4 S, consists of two independent molecules, A and B, with similar conformations. In both molecules, the pyrrolidine and dihydropyran rings adopt envelope conformations, and are trans-fused; the tosyl group is attached to the pyrrolidine ring
The X-ray crystallographic study of the title compound, C 24 H 20 ClN 3 OS, clearly demonstrates that 1,3-dipolar cycloaddition occurs at the C N double bond of the 1,5benzodiazepine.
The 2,3,4,4a,5, isoquinoline-7(7aH)-one ring system is prepared from a 4-arylpyridine precursor by sequential intramolecular enolate addition to a pyridinium ion, Dieckmann cyclization, and catalytic hydrogenation.