%0 Journal Article %T S¨ªntese do piperonal a partir do ¨®leo essencial de pimenta longa (Piper hispidinervium C. DC.) %A Cremasco %A Marco Aur¨¦lio %A Braga %A Nazareno de Pina %J Acta Amazonica %D 2012 %I Instituto Nacional de Pesquisas da Amaz?nia %R 10.1590/S0044-59672012000200014 %X the essential oil of long-pepper (piper hispidinervum c. dc) is rich in safrole, then susceptible to isomerization reaction to obtain cis, trans-isosafrole. in this paper it is presented the eletroxidation of cis, trans-isosafrole from direct isomerization of essential oil of long-pepper, with 99,7% of convertion to isosafrole glicol, that it is react by oxidation to convert 99% into piperonal with 84,9% purity. %K isomerization %K eletroxidation %K isosafrole %K isosafrole glicol. %U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0044-59672012000200014&lng=en&nrm=iso&tlng=en