A facile synthesis of a novelclass of steroidal A/B/D-ring annulated tetrazolo[1,5-a]pyridine derivatives has been accomplished via intramolecular 1,3-dipolar cycloaddition reaction of azide with nitrile in aprotic solvent. The synthesis of D-ring annulated tetrazolo[1,5-a]pyridine in alcohol showed incorporation of an alcohol molecule into the heterocyclic system.
通过在质子惰性溶剂中叠氮化物与腈的分子内1,3-偶极环加成反应,可以轻松合成新型的类固醇A / B / D环环状四唑[1,5-a]吡啶衍生物。在醇中D环环化的四唑并[1,5-a]吡啶的合成显示了将醇分子掺入杂环系统中。