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首页> 外文期刊>Heterocycles: An International Journal for Reviews and Communications in Heterocyclic Chemistry >XANTHONES IN HETEROCYCLIC SYNTHESIS. AN EFFICIENT ROUTE FOR THE SYNTHESIS OF C-3 o-HYDROXYARYL SUBSTITUTED 1,2-BENZISOXAZOLES AND THEIR N-QXIDES, POTENTIAL SCAFFOLDS FOR ANGIOTENSIN(II) ANTAGONIST HYBRID PEPTIDES
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XANTHONES IN HETEROCYCLIC SYNTHESIS. AN EFFICIENT ROUTE FOR THE SYNTHESIS OF C-3 o-HYDROXYARYL SUBSTITUTED 1,2-BENZISOXAZOLES AND THEIR N-QXIDES, POTENTIAL SCAFFOLDS FOR ANGIOTENSIN(II) ANTAGONIST HYBRID PEPTIDES

机译:杂合合成中的黄嘌呤。合成C-3邻羟基取代的1,2-苯并异恶唑及其N-QXIDES,血管紧张素(II)拮抗剂肽的潜在骨架的有效路线

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摘要

Regioselective substitution of xanthone and its nucleophilic cleavage allow the synthesis of C-3 o-hydroxyaryl substituted 1,2-benzisoxazoles or their TV-oxides by cyclodehydration or oxidative cyclization of their corresponding ketoxime precursors, respectively. Molecular modeling analysis and 'H NMR spectra indicate an intramolecular H-bonding engaging phenol OH and the isoxazole ring N atom.
机译:黄酮的区域选择性取代及其亲核性裂解分别通过相应的酮肟前体的环化脱水或氧化环化反应,可以合成C-3邻羟基芳基取代的1,2-苯并恶唑或它们的TV氧化物。分子模型分析和1 H NMR光谱表明分子内的H键与酚OH和异恶唑环的N原子结合。

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