在5-氨基-3-甲基-1-苯基吡唑(1)与醛(2)反应中合成一系列双吡唑并[3,4- b:4',3'- e ]吡啶(3))描述了在微波辐射和无溶剂条件下)。产品的结构阐明基于对1 H-COSY,NOESY,DEPT,HSQC和HMBC等实验的详细nmr分析。这些化合物在体外对皮肤真菌具有中等程度的抗真菌活性。
The synthesis of a series of bis-pyrazolo[3,4-b:4′,3′-e]pyridines (3) in the reaction of 5-amino-3-methyl-1-phenylpyrazole (1) with aldehydes (2) under microwave irradiation and solvent-free conditions is described. The structure elucidation of the products is based on detailed nmr analysis of experiments such as 1H-COSY, NOESY, DEPT, HSQC and HMBC. These compounds showed moderate antifungal in vitro
在5-氨基-3-甲基-1-苯基吡唑(1)与醛(2)反应中合成一系列双吡唑并[3,4- b:4',3'- e ]吡啶(3))描述了在微波辐射和无溶剂条件下)。产品的结构阐明基于对1 H-COSY,NOESY,DEPT,HSQC和HMBC等实验的详细nmr分析。这些化合物在体外对皮肤真菌具有中等程度的抗真菌活性。
A mild method for the synthesis of bis-pyrazolo[3,4-b:4′,3′-e]pyridine derivatives
A mild and efficient method for the synthesis of bispyrazolo[3,4-b:4′,3′-e]pyridines from 5-aminopyrazoles and aromatic aldehydes using an inexpensive FeCl3 catalyst is reported. The reaction temperature was reduced from 220–250 °C to 130 °C compared to conventional methods. A large proportion of the products precipitated directly from the mixture at room temperature. Aliphatic and α,β-unsaturated
报道了使用廉价的FeCl 3催化剂从5-氨基吡唑和芳族醛合成双吡唑并[3,4- b:4',3'- e ]吡啶的温和而有效的方法。与传统方法相比,反应温度从220–250°C降至130°C。在室温下,很大一部分产物直接从混合物中沉淀出来。脂肪族和α,β-不饱和醛选择性地导致形成相应的1 H-吡唑并[3,4- b ]吡啶衍生物。还提出了可能的多米诺反应机制。经由Sonogashira偶联反应将几个芳基炔基引入这些三环分子。