One-Step Conversion of Pyridine <i>N</i>-Oxides to Tetrazolo[1,5-<i>a</i>]pyridines
作者:John M. Keith
DOI:10.1021/jo061819j
日期:2006.12.1
PyridineN-oxides were converted to tetrazolo[1,5-a]pyridines in good to excellent yield by heating in the presence sulfonyl or phosphoryl azides and pyridine in the absence of solvent. Various sulfonyl and phosphoryl azides were screened for reactivity under a standard set of conditions. Diphenyl phosphorazidate was the most convenient reagent and gave high yields. Reaction optimization, scope, and
通过在磺酰基或磷酰基叠氮化物和吡啶存在下加热,在不存在溶剂的情况下加热,将吡啶N-氧化物以良好或优异的产率转化为四唑并[1,5- a ]吡啶。在一组标准条件下筛选各种磺酰基和磷酰基叠氮化物的反应性。叠氮磷酸二苯酯是最方便的试剂,收率很高。讨论了反应优化,范围和可伸缩性。