Synthesis of 2 or 3-(hetero)aryl pyrazolo[1,5-a]pyridines through [3 + 2] cycloaddition ofN-aminopyridine with β-nitrostyrenes followed byin situdenitration under metal-free and mild conditions are described.
通过[3 + 2]环加成法合成2或3-(杂)芳基吡唑并[1,5-a]吡啶,方法是使用N-氨基吡啶与β-硝基苯乙烯进行环加成,然后在无金属和温和条件下进行原位去硝化。