N-Methyl-N-phenylvinylsulfonamides for Cysteine-Selective Conjugation

Use of N-methyl- N-phenylvinylsulfonamides to perform chemoselective modification of cysteine-containing peptides and proteins is reported. Probes linked to the drug were applicable to prepare antibody-drug conjugates (ADCs). The drug-antibody ratio for ADCs was controlled by rationally tuning the electron deficiency and linker hydrophilicity of the probes.