Fotociclación intramolecular de orto-hidroxicinamatosdesde síntesis de cumarinas hasta polímeros fotodegradables

1. Sebastián Bonardd
2. Alex Abramov
3. José Juan Marrero-Tellado
4. David Díaz Díaz

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More publications in: Anales de Química de la RSEQ

Abstract

Coumarins are of great interest mainly due to their numerous biological applications. Trans-o- hydroxycinnamic acid, its esters and amides are suitable starting materials for the synthesis of coumarins, which requires prior E®Z isomerization of the double bond followed by a cyclization step. Such isomerization can be carried out, among other methods, through a photochemical process in the presence of a sensitizer, either initiated by UV light or mediated by visible light using organic or transition metal photocatalysts or in the absence of a photocatalyst taking advantage of a UV®Vis bathochromic displacement of o-hydroxycinnamates under basic conditions.

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