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).
Discovery and biological evaluation of biaryl acetamide derivatives as selective and in vivo active sphingosine kinase-2 inhibitors
作者:Yanan Li、Gang Li、Yiming Wang、Longfei Li、Yali Song、Fei Cao、Kan Yang