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Catalytic synthesis of 2,2′-arylmethylenebis(3-hydroxy-5,5-dimethylcyclohex-2-en-1-ones) and 3,3,6,6-tetramethyl-9-aryl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-diones

✍ Scribed by E. A. Dikusar, V. I. Potkin, N. G. Kozlov…

Book ID
120771840
Publisher
SP MAIK Nauka/Interperiodica
Year
2013
Tongue
English
Weight
231 KB
Volume
49
Category
Article
ISSN
1070-4280

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📜 SIMILAR VOLUMES

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 📂 Article 📅 2007 🏛 International Union of Crystallography 🌐 English ⚖ 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.

3,3,6,6-Tetra­methyl-9-(2-oxo-1,2-dihydr
3,3,6,6-Tetra­methyl-9-(2-oxo-1,2-dihydro­quinolin-3-yl)-1,2,3,4,5,6,7,8-octa­hydro-9H-xanthene-1,8-dione
✍ Selvanayagam, S. ;Paul, Jasmin ;Velmurugan, D. ;Ravikumar, K. ;Rathna Durga, R. 📂 Article 📅 2005 🏛 International Union of Crystallography 🌐 English ⚖ 296 KB

In the title compound, C 26 H 27 NO 4 , the central ring of the xanthene moiety is planar and the two outer rings are in halfboat conformations. The molecular packing in the crystal structure is stabilized by N-HÁ Á ÁO and C-HÁ Á ÁO hydrogen bonds in addition to van der Waals forces.