α-Methylene-β-lactams 3 were synthesized from the various 2-bromoallylamine derivatives 2 using a catalytic amount of Pd(OAc)2 or PD(acac)2 and PPh3, under 1–4 atom pressure of CO in good yields. Similarly, α-alkylidene-β-lactams 20 were synthesized from 3-alkyl-2-bromoallylamines 19, which were easily prepared from the olefins 14, in the same manner.
Site‐Selective Itaconation of Complex Peptides by Photoredox Catalysis
作者:Siyao Wang、QingQing Zhou、Xiaheng Zhang、Ping Wang
DOI:10.1002/anie.202111388
日期:2022.1.26
Photoredox catalysis has emerged as a powerful approach for site-selective peptide functionalization. Herein, we report a highly N-termini-specific method to rapidly access itaconated peptide derivatives under mild photoredox conditions. Distinct from conventional methods that rely on residue nucleophilicity, this method proceeds through a highly reactive carbamoyl radical intermediate to achieve excellent