Enantioselective Synthesis of Pyrazolo[3,4-b]pyridone Derivatives with Antifungal Activities against Phytophthora capsici and Colletotrichum fructicola
An efficient one-pot synthesis of pyrazolo[3,4-b]pyridinone derivatives catalyzed by L-proline
作者:Chun-Ling Shi、Hui Chen、Da-Qing Shi
DOI:10.1002/jhet.573
日期:2011.3
A series of 3‐methyl‐1,4‐disubstituted‐4,5‐dihydro‐1H‐pyrazolo[3,4‐b]pyridine‐6(7H)‐ones was synthesized via the three‐component reaction of aldehyde, 3‐methyl‐1‐phenyl‐1H‐pyrazol‐5‐amine, and Meldrum's acid catalyzed by L‐proline. This protocol has the advantages of easier work‐up, milder reaction conditions, and high yields. J. Heterocyclic Chem., (2011).
通过醛的三组分反应合成了一系列3-甲基-1,4-二取代-4,5-二氢-1H-吡唑并[3,4- b ]吡啶-6(7 H)-酮, 3-甲基-1-苯基-1 H-吡唑-5-胺,以及L-脯氨酸催化的Meldrum酸。该方案的优点是后处理容易,反应条件温和且收率高。J.杂环化学。(2011)。