Visible light-promoted metal-free aerobic photooxidation of xanthenes, thioxanthenes and dihydroacridines in deep eutectic solvents

Autor: Sarah-Jayne Burlingham, Alejandro Torregrosa-Chinillach, Diego A. Alonso, Rafael Chinchilla
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Tetrahedron Green Chem, Vol 2, Iss , Pp 100030- (2023)
Druh dokumentu: article
ISSN: 2773-2231
DOI: 10.1016/j.tgchem.2023.100030
Popis: Benzylic systems such as 9H-xanthenes, 9H-thioxanthenes and 9,10-dihydroacridines can be easily oxidized to the corresponding xanthones, thioxanthones or acridones, respectively, in deep eutectic solvents by a visible blue light-promoted photooxidation procedure carried out using ambient air as oxidant in the presence of riboflavin tetraacetate as a metal-free photocatalyst. The obtained yields are high or almost quantitative, and the reaction media can be recovered and reused. The environmental friendliness of the protocol is demonstrated based on several green metrics.
Databáze: Directory of Open Access Journals