Bovine serum albumin: An efficient and green biocatalyst for the one-pot four-component synthesis of pyrano[2,3-c]pyrazoles
作者:Xingtian Huang、Zhipeng Li、Dongyang Wang、Yiqun Li
DOI:10.1016/s1872-2067(15)61088-9
日期:2016.9
four-component reaction of aryl aldehydes, malononitrile, hydrazine hydrate, and ethyl acetoacetate for the synthesis of pyrano[2,3-c]pyrazoles under mild reaction conditions. The BSA biocatalyst also displayed a high catalytic affinity for acyclic/cyclic ketones to yield the corresponding pyrano[2,3-c]pyrazoles or their spirocyclic variants. The BSA could be used for at least five cycles without serious loss
Supported palladium oxide nanoparticles in Al-SBA-15 as an efficient and reusable catalyst for the synthesis of pyranopyrazole and benzylpyrazolyl coumarin derivatives via multicomponent reactions
作者:Majid M. Heravi、Reihaneh Malakooti、Kosar Kafshdarzadeh、Zahra Amiri、Vahideh Zadsirjan、Hassan Atashin
DOI:10.1007/s11164-021-04619-z
日期:2022.1
An eco-friendly method for diversity-oriented synthesis of substituted dihydropyrano[2,3-c]pyrazole and benzylpyrazolyl coumarin derivatives has been achieved via one-pot and multicomponent reaction in the presence of PdO/Al-SBA-15 as an efficient and recyclable catalyst in H2O/EtOH under reflux conditions. The significant merits of this method are wide scope, high yields of the desired products, short
在 PdO/Al-SBA-15 存在下,通过一锅多组分反应,实现了一种生态友好的方法,用于合成取代二氢吡喃并[2,3- c ]吡唑和苄基吡唑基香豆素衍生物,作为一种高效且回流条件下在 H 2 O/EtOH 中的可回收催化剂。该方法的显着优点是适用范围广、所需产物收率高、反应时间短和后处理程序简单。此外,这种纳米催化剂被简单地回收和重复使用五次,而催化活性和性能没有显着损失。 图形概要
Bovine serum albumin catalyzed one-pot, three-component synthesis of dihydropyrano[2,3-c]pyrazole derivatives in aqueous ethanol
作者:Kiran S. Dalal、Yogesh A. Tayade、Yogesh B. Wagh、Darshak R. Trivedi、Dipak S. Dalal、Bhushan L. Chaudhari
DOI:10.1039/c5ra13014j
日期:——
(BSA) catalyzed synthesis of dihydropyrano[2,3-c]pyrazolederivatives via a one pot, three component reaction of an aldehyde/ketone/isatin, malononitrile and 3-methyl-1H-pyrazol-5-(4H)-one in H2O–EtOH (7 : 3) at ambient temperature was developed in this work. The catalyst was found to work efficiently for aldehydes, ketones and isatins to give the corresponding dihydropyrano[2,3-c]pyrazole and spiro[indoline-3
牛血清白蛋白(BSA)通过一锅,醛/酮/ Isatin,丙二腈和3-甲基-1 H-吡唑-5-(4)的三组分反应催化合成二氢吡喃并[2,3- c ]吡唑衍生物在这项工作中,在环境温度下在H 2 O–EtOH(7:3)中形成了H)-1。发现该催化剂可有效地用于醛,酮和靛红,得到相应的二氢吡喃并[2,3- c ]吡唑和螺[吲哚啉-3,4'-吡喃并[2,3- c][吡唑]衍生物的收率很高。BSA对各种醛,芳族/脂肪族酮和取代的isatins表现出广泛的催化混杂性。使用对环境无害的方案,催化剂的可重复使用性,避免使用有害溶剂,优异的收率,易于加工且不会形成副产物,使得BSA成为进一步用作生物催化剂的有吸引力的候选者。