Red light-induced conjugation of amines through amide bond formation triggered via photooxidation of 3-acylindolizines.

ABSTRACT: The development of a conjugation method initiated by irradiation of long-wavelength light (>500 nm) to prepare densely functionalized molecules while avoiding undesired photodegradation has attracted considerable attention. Here we show an amide bond formation method based on the photoreaction of 3-acylindolizines in the presence of amines triggered via red-light irradiation. Photooxidation of 3-acylindolizines using a catalytic amount of a photosensitizer and red light-emitting diodes (660 nm) affords the corresponding conjugated amides in nearly quantitative yields within <5 min. This transformation can be performed in aqueous organic solvents and is applicable to diverse aliphatic amines with various functional groups, including the moieties responsive to short-wavelength light.

SUBMITTER: Watanabe K 

PROVIDER: S-EPMC9814406 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature