A regioselective coupling reaction of Grignardreagents with allyl pyridyl ethers in the presence of MgBr2 is reported. Grignardreagents reacted easily with primary allyl ethers to afford C-1 alkylated products (SN2 reaction), and also reacted with secondary and tertiary allyl ethers to afford C-3 alkylated products (SN2′ reaction).
Abstract Allyl pyridyl ethers are important intermediates in organic synthesis, which could be accessed by Williamson or SNAr-type etherification. While Williamson etherification has been well studied, the SNAr-type reaction remains less explored. In this paper, a series of allyl pyridyl ethers were synthesized via transition metal-free SNAr-type etherification with different allylalcohols in good