Chlorophyll-catalyzed photochemical regioselective coumarin C–H arylation with diazonium salts. (28th September 2020)

• Record Type: Journal Article
• Authors: Moazzam, Ali; Jafarpour, Farnaz
• Is Part Of: New journal of chemistry. Volume 44:Number 39(2020)
• Page Start: 16692
• Page End: 16696
• Publication Date: 2020-09-28
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d0nj02012e
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A metal-free, direct C–H arylation of coumarins with aryl diazonium salts at room temperature using chlorophyll as a green photosensitizer is devised. Abstract : This communication describes the development of a mild method for the cross-coupling of the C3-position of coumarin with an array of diazonium salts mediated by chlorophyll as a biocatalyst via visible light catalysis. A natural pigment such as chlorophyll is used as a green photosensitizer and environmentally benign catalyst. This general and easy procedure provides a transition-metal-free alternative for the formation of 3-aryl coumarin derivatives at room temperature with good to excellent yields.