Synthesis of isoxazolo[3,4-b]pyridin-3(1H)-one and isoxazolo[5,4-b]-pyridin-3(2H)-one
作者:Mazhar Ali Khan、Fathi Kamel Rafla
DOI:10.1039/p19750000693
日期:——
α-(N′-Hydroxyamidino)acetohydroxamic acid (I) and 5-aminoisoxazol-3(2H)-one (V) were each condensed with acetylacetone to yield 2-hydroxyamino-4,6-dimethylpyridine-3-carboxylic acid (II) and 4,6-dimethyl-isoxazolo[5,4-b]pyridin-3(2H)-one (VIa) respectively. Compound (II) gave isoxazolo[3,4-b]pyridin-3(1H)-ones (III) on acetylation, benzoylation, and bromination. The structures of (II) and (VIa) were
将α-(N'-羟基ami基)乙酰氧肟酸(I)和5-氨基异恶唑-3(2 H)-一(V)与乙酰丙酮缩合,得到2-羟基氨基-4,6-二甲基吡啶-3-羧酸( II)和4,6-二甲基-异唑并[5,4- b ]吡啶-3(2 H)-one(VIa)。化合物(II)经乙酰化,苯甲酰化和溴化得到异恶唑并[3,4- b ]吡啶-3(1 H)-一(III)。通过将(II)和(VIa)转化成已知产物来证实它们的结构。