silver-promoted oxidative cascade reaction of N-aryl-3-alkylideneazetidines with carboxylic acids is reported, providing a very efficient pathway to functionalized fused pyridines. This method allows introduction of fused pyridine ring systems to heterocycles, drugs, and natural products. A mechanistic study revealed that silver salt is essential for the chemo- and regioselective ring expansion, sequential
据报道,N-芳基-3-亚烷基亚氮杂
环丁烷与
羧酸的多官能团
银促进了氧化级联反应,为官能化的稠合
吡啶提供了非常有效的途径。该方法允许将稠合的
吡啶环系统引入杂环,药物和
天然产物中。机理研究表明,
银盐对于
化学和区域选择性环的扩展,顺序的氧化亲核加成和氧化芳构化至关重要。该方法代表了应变的N-杂环一起经历具有π键和亲核试剂的级联反应的第一个例子。