building blocks are required to construct pharmaceutically important pyrazolidine-3,5-diones. Herein, we have described a novel method for their synthesis based on metal-free oxidative dehydrogenative N–N bond formation by PIDA-mediated reaction of easily accessible dianilide precursors. The developed mild reaction protocol features a good functional group tolerance and scalability. The application of
传统上,需要有毒且昂贵的
肼结构单元来构建药学上重要的
吡唑烷-3,5-二酮。在此,我们描述了一种新的合成方法,该方法基于通过
PIDA 介导的易于获得的
二苯胺前体的反应形成无
金属氧化脱氢 N-N 键。所开发的温和反应方案具有良好的官能团耐受性和可扩展性。该方法的应用通过精心设计的面向多样性的环丙基关键中间体的顺利官能化,提供了一种从廉价的起始原料
苯胺合成促
尿酸排泄剂 G-25671 和
磺吡酮的独特途径来证明。