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

Autor: Vladimir I. Potkin, O. P. Chepik, E. A. Dikusar, A. S. Pavlyuchenkova, R. M. Zolotar, A. P. Polikarpov, M. M. Ogorodnikova, Sergey K. Petkevich, M. Yu. Murashova, N. G. Kozlov, A. V. Kletskov
Rok vydání: 2013
Předmět:
Zdroj: Russian Journal of Organic Chemistry. 49:233-242
ISSN: 1608-3393
1070-4280
DOI: 10.1134/s1070428013020103
Popis: Condensation of substituted benzaldehydes of vanillin series with dimedone in methanol solution in the presence of catalytic quantities of triethylamine afforded 2,2′-arylmethylenebis(3-hydroxy-5,5-dimethylcyclohex-2-en-1-ones. By catalytic cyclization of the latter in boiling benzene in the presence of sulfo cation exchanger FIBAN K-1 as catalyst 3,3,6,6-trimethyl-9-aryl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-diones were synthesized.
Databáze: OpenAIRE