Cooperative photoredox/gold catalysed cyclization of 2-alkynylbenzoates with arenediazonium salts: synthesis of 3,4-disubstituted isocoumarins.
Org Biomol Chem
; 20(41): 8065-8070, 2022 10 26.
Article
en En
| MEDLINE
| ID: mdl-36200334
Several isocoumarins have been synthesised in good to excellent yields starting from 2-alkynylbenzoates and arenediazonium salts. The strategy involves a domino arylation/oxo-cyclization catalysed by a dual photoredox/gold catalytic system. The reactions run under mild conditions at room temperature in wet acetonitrile under irradiation with a blue-LED lamp, in the presence of a cationic gold catalyst and a cheap organic photocatalyst. The scope is quite broad and allows the preparation of isocoumarins differently disubstituted in positions 3 and 4. A plausible reaction mechanism is proposed.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Sales (Química)
/
Isocumarinas
Idioma:
En
Revista:
Org Biomol Chem
Asunto de la revista:
BIOQUIMICA
/
QUIMICA
Año:
2022
Tipo del documento:
Article
País de afiliación:
Italia
Pais de publicación:
Reino Unido