Simple and Efficient Synthesis of 2-Oxo-2H-Pyrido[1,2-a]Pyrimidin-3(4H)-Ylidene)Acetic Acid and Its Rearrangement in Presence of Acid Media
作者:Sharulatha Venugopal、Sivakamasundari Sundaram
DOI:10.1002/jhet.2361
日期:2016.5
A highly efficient one‐pot simple synthesis of 2‐[2‐oxo‐2H‐pyrido[1,2‐a]pyridmidn‐3(4H)‐ylidene)]acetic acid is described. The rearrangement of 2‐[2‐oxo‐2H‐pyrido[1,2‐a]pyridmidn‐3(4H)‐ylidene)]acetic acid in the presence of polyphosphoric acid (PPA) yielded a seven‐membered diazepine with decarboxylation and ring expansion.
描述了一种高效的2- [2-氧代-2H-吡啶并[1,2-a]吡啶基-3(4H)-亚烷基)]乙酸的一锅简单合成方法。在多磷酸(PPA)存在下对2- [2-氧代-2H-吡啶基[1,2-a]吡啶基-3(4H)-亚基)]乙酸的重排产生了具有脱羧作用的七元二氮杂并环膨胀。