作者:Xin Hao、Zhongmiao Xu、Hongfu Lu、Xuedong Dai、Ting Yang、Xichen Lin、Feng Ren
DOI:10.1021/acs.orglett.5b01628
日期:2015.7.17
A mild and regioselective N-alkylation reaction of 2-pyridones in water has been developed. Tween 20 (2% w/w) was added to create a micellar system for improved solubility of starting materials, which leads to enhanced reaction rates. The protocol demonstrated a wide substrate scope with good isolated yield's (40-94%) for all of the 24 examples evaluated. High regioselectivity favoring N-alkylation over O-alkylation was observed for benzyl halides (>5:1), primary alkyl halides (>6:1), and bulky and less reactive secondary alkyl halides (>2.4:1).