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J Org Chem. 2000 Jun 2;65(11):3387-94.

Open analogues of arcyriaflavin A. Synthesis through Diels-Alder reaction between maleimides and 1-aryl-3-tert-butyldimethylsiloxy-1, 3-butadienes.

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Laboratorio de Química Orgánica y Farmacéutica, Universidad de Salamanca, Facultad de Farmacia, Campus Miguel de Unamuno, E-37007 Salamanca, Spain.


The preparation of a range of open analogues of arcyriaflavin A is described. The synthetic approach is based on the use of perhydroisoindole-1,3,5-triones as key intermediates, which were obtained via Diels-Alder methodology using 1-aryl-3-siloxy-1, 3-butadienes as starting materials. Fischer indolization and aromatization processes afforded different methoxy-substituted arylpyrrolocarbazoles. The stereochemistry and conformation of the Diels-Alder products and the regiochemistry of the indolization reactions are supported by NMR and molecular modeling studies.

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