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1-Ethyl-4,4,6,8-tetramethyl-2-tosyl-2,3,3a,4,6,7,8,9-octahydro-1H-pyrrolo[3,4-c]pyrano[6,5-d]pyrimidine-7,9-dione

✍ Scribed by Chinnakali, K. ;Sudha, D. ;Jayagopi, M. ;Raghunathan, R. ;Fun, Hoong-Kun

Publisher
International Union of Crystallography
Year
2007
Tongue
English
Weight
913 KB
Volume
63
Category
Article
ISSN
1600-5368

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✦ Synopsis

The asymmetric unit of the title compound, C~22~H~29~N~3~O~5~S, contains two independent molecules, A and B, which differ slightly in the orientation of the ethyl and tosyl groups with respect to the attached pyrrolidine ring, as evidenced by the relevant torsion angles. In both molecules, the pyrrolidine and dihydropyran rings adopt envelope conformations, and are trans-fused. In molecule A, the tosyl group is equatorially attached to the pyrrolidine ring, whereas in B it is in a biaxial position. The pyrrolidine N atom exhibits sp
^2^ hybridization in molecule A and sp
^3^ hybridization in molecule B. In both molecules, the sulfonyl group has a distorted tetrahedral geometry. In the crystal structure, the molecules are linked into a three-dimensional framework by Cβ€”H...O hydrogen bonds.

πŸ“œ SIMILAR VOLUMES

4,4,7,7-Tetramethyl-2-tosyl-2,3,3a,4,6,7
4,4,7,7-Tetramethyl-2-tosyl-2,3,3a,4,6,7,8,9-octahydro-1H-pyrrolo[3,4-c]pyrano[6,5-b]cyclohexan-9-one
✍ Chinnakali, K. ;Sudha, D. ;Jayagopi, M. ;Raghunathan, R. ;Fun, Hoong-Kun πŸ“‚ Article πŸ“… 2007 πŸ› International Union of Crystallography 🌐 English βš– 835 KB

The title compound, C~22~H~29~NO~4~S, crystallizes with three independent molecules, __A__, __B__ and __C__, in the asymmetric unit. Each of the three independent molecules adopts a folded conformation, with the phenylsulfonyl group lying over the pyranocyclohexanone ring system, and with the pyrrol

4,4,6,8-Tetramethyl-2-tosylpyrrolo[3,4-c
4,4,6,8-Tetramethyl-2-tosylpyrrolo[3,4-c]pyrano[6,5-b]pyrimidine-7,9-dione
✍ Chinnakali, K. ;Jayagopi, M. ;Sudha, D. ;Raghunathan, R. ;Fun, Hoong-Kun πŸ“‚ Article πŸ“… 2007 πŸ› International Union of Crystallography 🌐 English βš– 1013 KB

In the title compound, C~20~H~25~N~3~O~5~S, the pyrrolidine ring is __trans__-fused to the dihydropyran ring. The pyrrolidine ring adopts a twist conformation and the dihydropyran ring is in an envelope conformation. The tosyl group is attached to the pyrrolidine ring in a biaxial position and its b

9-(4-Bromophenyl)-3,3,6,6-tetramethyl-3,
9-(4-Bromophenyl)-3,3,6,6-tetramethyl-3,4,6,7-tetrahydro-2H-xanthene-1,8(5H,9H)-dione
✍ Bigdeli, M. Ali ;Mahdavinia, Gholam Hossein ;Amani, Vahid πŸ“‚ Article πŸ“… 2007 πŸ› International Union of Crystallography 🌐 English βš– 646 KB

The title compound, C 23 H 25 BrO 3 , was synthesized by the reaction of p-bromobenzaldehyde with dimedone and HClO 4 / SiO 2 in EtOH. In the molecule, the dihydropyran ring adopts a boat conformation and the two cyclohexene rings are in a trans conformation.

6,8-Dimethyl-4-phenyl-2-tosylpyrrolo[3,4
6,8-Dimethyl-4-phenyl-2-tosylpyrrolo[3,4-c]pyrano[6,5-b]pyrimidine-7,9-dione
✍ Chinnakali, K. ;Jayagopi, M. ;Sudha, D. ;Raghunathan, R. ;Fun, Hoong-Kun πŸ“‚ Article πŸ“… 2007 πŸ› International Union of Crystallography 🌐 English βš– 611 KB

In the title compound, C~24~H~25~N~3~O~5~S, both the pyrrolidine and dihydropyran rings adopt envelope conformations, and are __cis__-fused. The tosyl group is equatorially attached to the pyrrolidine ring. The glide-related molecules are linked by Cβ€”H...O hydrogen bonds, forming a __C__(6) chain al