作者:Nikol’skiy, Vladislav V.、Minyaev, Mikhail E.、Bastrakov, Maxim A.、Starosotnikov, Alexey M.
DOI:10.3762/bjoc.20.94
日期:——
the synthesis of isoxazolo[4,5-b]pyridines has been developed on the basis of readily available 2-chloro-3-nitropyridines via the intramolecular nucleophilic substitution of the nitro group as a key step. The previously unknown base-promoted Boulton–Katritzky rearrangement of isoxazolo[4,5-b]pyridine-3-carbaldehyde arylhydrazones into 3-hydroxy-2-(2-aryl[1,2,3]triazol-4-yl)pyridines was observed. Beilstein
抽象的 在容易获得的2-氯-3-硝基吡啶的基础上,通过硝基的分子内亲核取代作为关键步骤,开发了一种有效合成异恶唑并[4,5- b ]吡啶的方法。先前未知的碱基促进的异恶唑并[4,5- b ]吡啶-3-甲醛芳基腙重排为3-羟基-2-(2-芳基[1,2,3]三唑-4-基)吡啶被观察到。 Beilstein J. Org. Chem. 2024, 20, 1069–1075. doi:10.3762/bjoc.20.94