Visible-Light-Induced Direct Photoamination of BODIPY Dyes with Aqueous Ammonia

Org Lett. 2023 Oct 27;25(42):7650-7655. doi: 10.1021/acs.orglett.3c02962. Epub 2023 Oct 13.

Abstract

By taking advantage of their strong absorption ability, visible-light-induced direct photoamination of BODIPY dyes with aqueous ammonia was developed to give structurally diverse α-amino BODIPYs. The excited state of BODIPYs possessed higher electron affinity than the ground state and thus showed largely enhanced reactivity toward weak nucleophile of ammonia. Those α-amino BODIPYs are valuable synthetic intermediates and have been successfully demonstrated in several post-transformation reactions. The work indicates that photoreaction is an excellent alternative to conventional functionalization of this popular fluorophore.