Solvent-Free Synthesis of 1,8-Dioxo-octahydroxanthenes and 14-Aryl-14H-dibenzo[a,j]xanthenes using Saccharin Sulfonic Acid as an Efficient and Green Catalyst (original) (raw)

Dowex-50W promoted synthesis of 14-aryl-14H-dibenzo[a,j]xanthene and 1,8-dioxo-octahydroxanthene derivatives under solvent-free conditions

Applied Catalysis A: General, 2007

This article was originally published in a journal published by Elsevier, and the attached copy is provided by Elsevier for the author's benefit and for the benefit of the author's institution, for non-commercial research and educational use including without limitation use in instruction at your institution, sending it to specific colleagues that you know, and providing a copy to your institution's administrator. All other uses, reproduction and distribution, including without limitation commercial reprints, selling or licensing copies or access, or posting on open internet sites, your personal or institution's website or repository, are prohibited. For exceptions, permission may be sought for such use through Elsevier's permissions site at: http://www.elsevier.com/locate/permissionusematerial A u t h o r ' s p e r s o n a l c o p y Short communication Dowex-50W promoted synthesis of 14-aryl-14H-dibenzo[a,j]xanthene and 1,8-dioxo-octahydroxanthene derivatives under solvent-free conditions

Ferric hydrogensulfate catalyzed synthesis of aryl 14H-dibenzo[a,j] xanthene derivatives under thermal and solvent-free conditions

Journal of the Brazilian Chemical Society, 2008

O hidrogenossulfato férrico tem sido utilizado como catalisador para a preparação em um único pote dos derivados de aril 14H-dibenzo[a,j]xantenos por ciclocondensação de-naftol e benzaldeídos substituídos, em condições livres de solvente e aquecimento. Este método tem a vantagem de fornecer rendimentos elevados, reações mais limpas, metodologia simples, menor tempo de reação, fácil tratamento e condições experimentais menos poluentes. Ferric hydrogensulfate as catalyst has been used for the one-pot preparation of aryl 14Hdibenzo[a,j]xanthene derivatives by cyclocondensation of-naphthol and substituted benzaldehydes under solvent-free and thermal conditions. This method has the advantages of high yields, a cleaner reaction, simple methodology, short reaction times, easy workup and greener conditions.