Preparation and antiinflammatory activity of 2- and 4-pyridones
作者:James Benjamin Pierce、Zaven S. Ariyan、Gaye Stuart Ovenden
DOI:10.1021/jm00344a008
日期:1982.2
been self-condensed to form pyridones. N-Alkylacetoacetamides give 2-pyridones, while N-arylacetoacetamides give 4-pyridones. In an attempt to develop nonacidic, nonsteroidal antiinflammatory agents, the pyridones were tested in a carrageenan-induced pedal edema assay in rats. While the 2-pyridones were not active, 9 of 17 4-pyridones tested were active, and one compound (4g) had antiinflammatory efficacy
Bivalent ligands can engage homodimeric protein targets with high affinity due to avidity effects. This study shows that compounds conjugated to a masked formyl acetamide can be coupled efficiently and conveniently through trifluoroacetic acid (TFA)-catalyzed pyridone formation. In most cases, the product is produced in nearly quantitative yield and in excellent purity. The reaction is tolerant of
Mediated by sodium persulfate (Na(2)S(2)0(8)), a series of polysubstituted 4-pyridones were synthesized via self-condensation of N-aryl acetoacetamides, during which a novel N to C 1,3-acyl migration should be involved. The structure of 4-pyridone was unequivocally confirmed by X-ray diffraction analysis. However, the self-condensation of N-benzyl acetoacetamides under the same condition gave polysubstituted 2-pyridones instead of 4-pyridones.
Syntheses of 5-(Alkylaminocarbonyl)-4,6-dimethyl-2-pyridones from N-Alkyl-3-oxobutanamides