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Rose Bengal Immobilized on Cellulose Paper for Sustainable Visible‐Light Photocatalysis

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Rose Bengal immobilized on cellulose paper is described as a new, efficient and recoverable photocatalyst for the visible-light functionalization of N-aryltetrahydroisoquinolines and quinoxalin-2(1H)-ones.


Abstract

This work reports the heterogenization of Rose Bengal dye on simple cellulose paper sheets (Cell-RB) through copper-catalyzed azide-alkyne click ligation. The photocatalytic properties of Cell-RB under green LED irradiation were evaluated in a series of dehydrogenative transformations for the functionalization of N-aryltetrahydroisoquinolines and quinoxalin-2(1H)-ones. The excellent photocatalytic activities observed, associated to the ease of recovery with simple tweezers, highlight the strong assets of Cell-RB with respect to traditional homogeneous organic photocatalysts.

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