A novel and efficient method for selective Michael addition of 2-pyridones to ethenesulfonyl
fluoride (ESF) and 1-bromoethene-1-sulfonyl fluoride (BESF) has been developed for
constructing a class of pyridonyl aliphatic sulfonyl fluorides and pyridonyl vinyl
sulfonyl fluorides in good to excellent yields. This practical method features easy
operation, wide substrate scope, and mild reaction conditions.
Key words
2-pyridones - pyridonyl vinyl sulfonyl fluorides - Michael addition - pyridonyl aliphatic
sulfonyl fluorides - click chemistry