H3PMo7W5O40·24H2O catalyzed access to fused pyrazolopyranopyrimidine derivatives via one-pot multicomponent synthesis: green chemistry
作者:Dipak S. Aher、Kiran R. Khillare、Laxmikant D. Chavan、Sunil G. Shankarwar
DOI:10.1007/s00706-021-02868-7
日期:2022.1
aldehydes in the presence of catalytic amount of H3PMo7W5O40·24H2O under solvent-free condition was reported. This environmentally benign protocol offers selective synthesis of pyrazolopyranopyrimidine derivatives without any side product with excellent yield in shorter time. Graphical abstract
一种经济、可持续和直接的环境友好型合成 3-methyl-4-aryl-1,4-dihydropyrazolo[4ʹ,3ʹ:5,6]pyrano[2,3 - d ]pyrimidine-5,7(6)报道了在无溶剂条件下,在催化量的 H 3 PMo 7 W 5 O 40 ·24H 2 O存在下,乙酰乙酸乙酯、水合肼、巴比妥酸和芳香醛缩合得到H ,8 H )-二酮。这种环境友好的协议提供了吡唑并吡喃并嘧啶衍生物的选择性合成,没有任何副产物,并且在更短的时间内具有出色的收率。 图形概要
Extending the scope of oleic acid catalysis in diversity-oriented synthesis of chromene and pyrimidine based scaffolds
non-toxic, biodegradable oleicacid was found to catalyse 4H-chromene derivatives syntheses in good yields in a water medium. A facile domino one-pot protocol was also developed for the oleicacid catalysed pyrimidine-fused heterocycle synthesis by pseudo three-component, three-component and four-component reactions. All the products were obtained in good to excellent yields. Oleicacid catalysis was further
Synthesis of Novel Acidic Ionic Liquid [BBSA-DBU][HSO4] and Its Catalytic Activities for Synthesis of Pyrazolopyranopyrimidine Derivatives
作者:M. Patil、S. Shinde、S. Damate、S. Patil
DOI:10.14233/ajchem.2018.21028
日期:——
Pyrazolopyranopyrimidines are a nitrogen and oxygen containing heterocyclic compounds and are useful in organic synthesis and medicinal chemistry because pyrazolopyranopyrimidines contain both pyranopyrimidine and pyranopyrazole as biologicalactive nucleous [16]. Pyranopyrazoles derivatives have occupied a unique position in medicinal chemistry because of their biological and pharmacological activities [17], analgesic
Magnetic Nanoparticle Supported Ionic Liquid Assisted Green Synthesis of Pyrazolopyranopyrimidines and 1,6-diamino-2-oxo-1,2,3,4-tetrahydropyridine-3,5- dicarbonitriles
作者:Fatemeh Rigi、Hamid Reza Shaterian
DOI:10.1002/jccs.201500407
日期:2016.7
A simple and eco‐friendly green protocol was used for synthesis of pyrazolopyranopyrimidines via four‐component reaction of hydrazine hydrate, ethyl acetoacetate, barbituricacid or dimethyl barbituricacid, and aromatic aldehydes under thermal and solvent‐free conditions in the presence of magnetic nanoparticle supported silica bonded n‐propyl‐4‐aza‐1‐azoniabicyclo[2.2.2]octane chloride (MNPs@DABCO+Cl−)
Heteropolyacid supported on amine-functionalized halloysite nano clay as an efficient catalyst for the synthesis of pyrazolopyranopyrimidines via four-component domino reaction
作者:Samahe Sadjadi、Majid M. Heravi、Mansoureh Daraie
DOI:10.1007/s11164-016-2756-8
日期:2017.4
An efficient heterogeneous hybrid catalyst was developed by functionalization of halloysite clay nanotubes by γ-aminopropyltriethoxysilane and then immobilization of a Keggin type heteropolyacid, phosphotungstic acid. This hybrid catalyst was characterized by SEM/EDX, FTIR and XRD and its catalytic activity for the synthesis of pyrazolopyranopyrimidine derivatives via four-component domino reaction