The electrocatalytic ring-opening dihydroalkoxylation of N-aryl maleimides with alcohols under metal- and oxidant-free conditions is described. This electrochemical process consists of anodic single-electron transfer oxidation, cathodic radical reduction, rearrangement-ring cleavage and nucleophilic addition cascade, which employs tetrabutylammonium bromide not only as a redox catalyst but also as
Rhodium(III)-Catalyzed C–H Alkenylation: Access to Maleimide-Decorated Tryptophan and Tryptophan-Containing Peptides
作者:Jingjing Peng、Chunpu Li、Mirzadavlat Khamrakulov、Jiang Wang、Hong Liu
DOI:10.1021/acs.orglett.0c00086
日期:2020.2.21
Maleimide is widely applied in many fields, especially in antibody-drug conjugations and peptide drugs. Herein, we develop a strategy for the C-H alkenylation of tryptophan and tryptophan-containing peptides, providing a synthetic route of decorating maleimide on peptides. The method has a high tolerance of functional groups and protecting groups. Furthermore, this method was applied to prepare peptide conjugation with molecules such as drugs and fluorescence probes. Moreover, macrocyclic peptides were obtained via this reaction.