A novel Au-catalyzed domino reaction for the synthesis of imidazo[1,2-a]pyridines from 2-aminopyridine and N-tosylhydrazones has been developed using molecular oxygen. It represents a new strategy for the formation of CN bonds. This transformation demonstrated a broad tolerance toward the substrates and allowed the generation of a diverse imidazo[1,2-a]pyridine derivatives with good yields.
利用分子氧开发了一种新的金催化的多米诺骨牌反应,该反应由2-氨基吡啶和N-甲苯磺酰hydr合成咪唑并[1,2- a ]吡啶。它代表了形成C N键的新策略。该转化显示出对底物的广泛耐受性,并允许以良好的产率产生多种咪唑并[1,2- a ]吡啶衍生物。
Regioselective Synthesis of 1,4‐Dienes via Palladium‐Catalyzed Oxidative Allylation of <i>N</i>‐Tosylhydrazones
A palladium-catalyzed allylic C−H oxidative allylation of N-tosylhydrazones to synthesize skipped 1,4-dienes is demonstrated. This direct allylic alkylation reaction has excellent site selectivity, tolerates a wide range of functional groups, and affords 1,4-dienes in moderate to good yield. Moreover, this olefination method allows the regio- and stereoselective synthesis of 1,4-dienes containing a