o-Phthalic Anhydride/Zn(OTf)2 co-catalyzed Beckmann rearrangement under mild conditions
作者:Ze-Feng Xu、Teng Zhang、Wenjun Hong
DOI:10.1016/j.tet.2019.04.056
日期:2019.6
o-Phthalic anhydride/Zn(OTf)2 co-catalyzed Beckmann rearrangement was developed, producing the corresponding amide in up to 99% yield with acid-sensitive functionalities tolerated well, and the scale of the reaction could be enlarged to 77 mmol and the excellent yield was maintained. A successive procedure was developed. Moreover, the reaction was carried out at rt under nearly neutral conditions,
研发了邻苯二酸酐/ Zn(OTf)2共同催化的贝克曼重排反应,以高达99%的产率生产了相应的酰胺,并且对酸敏感的官能团具有良好的耐受性,并且反应规模可以扩大到77 mmol,并且保持了极好的产量。开发了一个连续的程序。此外,该反应在接近中性的条件下在室温下进行,并且后处理是简洁的。这些特征说明了该方案在酰胺合成中的潜力。