在没有任何催化剂的情况下通过离子液体中的三组分反应轻松合成呋喃并[3,4- e ]吡唑并[3,4- b ]吡啶-5(7 H)-一衍生物
摘要:
一系列呋喃并[3,4- e ]吡唑并[3,4- b ]吡啶-5(7 H)-一和茚并[2,1- e ]吡唑并[3,4- b ]吡啶-5(1通过醛的三组分反应合成了H)-一衍生物,5-氨基吡唑和tetronic酸或无需任何催化剂的离子液体中的1,3-茚满二酮。产品的结构已通过光谱数据确定,并通过X射线衍射分析进一步证实。该方法的优点是后处理更容易,反应条件温和,产率高以及对环境无害。J. Heterocyclic Chem。,46,469(2009)。
A series of furo[3,4-e]pyrazolo[3,4-b]pyridine analogues of podophylloxin were synthesized via three-component reactions of aldehydes, 3-methyl-1-phenyl-1H-pyrazol-5-amine and tetronic acid in water under microwave irradiation without catalyst. This efficientsynthesis not only offers an economical and green synthetic strategy to this class of significant compounds but also enriches the investigations
通过醛,3-甲基-1-苯基-1 H-吡唑-5-胺和醛的三组分反应合成了一系列鬼臼毒素的呋喃[3,4- e ]吡唑并[3,4- b ]吡啶类似物。在没有催化剂的情况下,在微波辐射下的水中含有四氢邻苯二甲酸。这种有效的合成方法不仅为这类重要化合物提供了一种经济,绿色的合成策略,而且丰富了水中微波辅助合成方法的研究。
Clean synthesis of furo[3,4-<i>e</i>]pyrazolo[3,4-<i>b</i>]pyridine-5-one derivatives in aqueous media
作者:Da-Qing Shi、Hao Yao
DOI:10.1002/jhet.224
日期:2009.11
A series of 4‐aryl‐3‐methyl‐1‐phenyl‐7H‐furo[3,4‐e]pyrazolo[3,4‐b]pyridine‐5‐ones were synthesized via the three‐component reaction of an aldehyde, 5‐amino‐3‐methyl‐1‐phenyl‐1H‐pyrazole and tetronic acid in aqueousmedia in the presence of triethylbenzylammonium chloride (TEBAC). This method has the advantages of easier work‐up, mild reaction conditions, high yields, and an environmentally benign procedure
通过醛的三组分反应合成了一系列的4-芳基-3-甲基-1-苯基-7 H-呋喃[3,4- e ]吡唑并[3,4- b ]吡啶-5-酮,在三乙基苄基氯化铵(TEBAC)存在下,在水性介质中的5-氨基-3-甲基-1-苯基-1 H-吡唑和tetronic酸。该方法的优点是后处理容易,反应条件温和,收率高以及对环境无害。J.杂环化学,(2009)。