Iodine‐Promoted Synthesis of Dipyrazolo/Diuracil‐Fused Pyridines and
<i>o</i>
‐Amino Diheteroaryl ketones via Oxidative Domino Annulation of 2/4‐Methylazaarenes
4-b:4′,3′-e]pyridines (BPPs), diuracilpyridines and o-amino diheteroaryl ketones. The domino procedure proceeded with easily available methyl azaarenes, 5-aminouracils and substituted 5-aminopyrazoles. This protocol is a simple and metal-free approach which exhibits high functional group compatibility and broad substrates scope. Moreover, this transformation can be applied for the preparation of dipyr
碘促进的氧化多米诺环化和羰基化过程已被开发用于合成具有生物学意义的氮杂芳烃取代的双吡唑并[3,4- b :4',3'- e ]吡啶(BPPs)、双尿嘧啶和邻氨基二杂芳基酮。多米诺程序使用易于获得的甲基氮杂芳烃、5-氨基尿嘧啶和取代的 5-氨基吡唑进行。该协议是一种简单且无金属的方法,具有高官能团兼容性和广泛的底物范围。此外,这种转化可用于制备克级联吡唑并/双尿嘧啶稠合的吡啶。
Solvent-free microwave synthesis of bis-pyrazolo[3,4-<i>b</i>:4′,3′-<i>e</i>]-pyridines and study of their antifungal properties
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。