Photoswitchable dynamic conjugate addition-elimination reactions as a tool for light-mediated click and clip chemistry.

ABSTRACT: Phototriggered click and clip reactions can endow chemical processes with high spatiotemporal resolution and sustainability, but are challenging with a limited scope. Herein we report photoswitchable reversible covalent conjugate addition-elimination reactions toward light-addressed modular covalent connection and disconnection. By coupling between photochromic dithienylethene switch and Michael acceptors, the reactivity of Michael reactions was tuned through closed-ring and open-ring forms of dithienylethene, allowing switching on and off dynamic exchange of a wide scope of thiol and amine nucleophiles. The breaking of antiaromaticity in transition states and enol intermediates of addition-elimination reactions provides the driving force for photoinduced change in kinetic barriers. To sho

SUBMITTER: Lu H 

PROVIDER: S-EPMC10328932 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature