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4,4,6,8-Tetramethyl-2-tosylpyrrolo[3,4-c]pyrano[6,5-b]pyrimidine-7,9-dione

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

Publisher
International Union of Crystallography
Year
2007
Tongue
English
Weight
1013 KB
Volume
63
Category
Article
ISSN
1600-5368

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✦ Synopsis

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 benzene ring forms a dihedral angle of 85.61β€…(4)Β° with the pyrimidine ring. The crystal packing shows that the molecules are linked into a three-dimensional framework through Cβ€”H...O hydrogen bonds.

πŸ“œ SIMILAR VOLUMES

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

1-Ethyl-4,4,6,8-tetramethyl-2-tosyl-2,3,
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
✍ Chinnakali, K. ;Sudha, D. ;Jayagopi, M. ;Raghunathan, R. ;Fun, Hoong-Kun πŸ“‚ Article πŸ“… 2007 πŸ› International Union of Crystallography 🌐 English βš– 913 KB

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, t

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

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.

10-(4-Chlorophenyl)-9-(4-methoxyphenyl)-
10-(4-Chlorophenyl)-9-(4-methoxyphenyl)-3,3,6,6-tetramethyl-3,4,6,7-tetrahydroacridine-1,8(2H,5H,9H,10H)-dione
✍ Chen, Yan ;Hao, Wen-Juan ;Tang, Zi-Qiang ;Jiang, Bo ;Li, Chun-Mei πŸ“‚ Article πŸ“… 2007 πŸ› International Union of Crystallography 🌐 English βš– 833 KB

The title compound, C 30 H 32 ClNO 3 , was synthesized by the reaction of dimedone with 4-methoxybenzaldehyde and 4chlorobenzenamine in water. The dihydropyridine ring is in a boat conformation. Both cyclohexene rings adopt envelope conformations. The chlorophenyl and methoxyphenyl rings form dihedr