We discovered a new retro-Mannich reaction of in situ prepared pyrazolopyridines to give pyrazolopyrimidines that have hitherto been underrepresented in the heterocyclic chemistry literature. The isolation of a linear hydrolysis product supports a mechanistic hypothesis for this rearrangement process. In order to establish a broader access and explore potential biological applications for these medicinal chemistry building blocks, we investigated the scope of the reaction and generated small amine- as well as amide-based libraries through reductive aminations and amide couplings, respectively.
我们发现了一种新的原位制备吡唑并吡啶的逆曼尼希反应,从而得到了迄今为止在杂环化学文献中代表性不足的吡唑并嘧啶。线性水解产物的分离支持了这一重排过程的机理假设。为了更广泛地利用这些药物化学构件并探索其潜在的生物学应用,我们研究了该反应的范围,并分别通过还原胺化和酰胺偶联生成了小型胺类和酰胺类化合物库。