Photoinduced Borylation of the Inert C(sp3)-O Bond of Alkyl Heteroaryl Ethers
Organic letters(2023)
摘要
A photoinduced reductive C-alkyl-O borylation of alkyl heteroaryl ethers with very negative reduction potential in the presence of 4-dimethylaminopyridine (DMAP) and bis(catecholato)diborane(B(2)cat(2)) was developed. Despite the high reducing power, various substrates with liable functional groups were well-tolerated as well as ethers derived from natural products and medicinal-relevant compounds. Mechanistic investigation implied that an intra-single electron transfer process in an electron donor-acceptor complex formed from ethers with the adduct of B(2)cat(2) and DMAP should be involved.
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