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
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
Investigation of the uncommon basic properties of [Ln(W5O18)2]9– (Ln = La, Ce, Nd, Gd, Tb) by changing central lanthanoids in the syntheses of pyrazolopyranopyrimidines
作者:Nahid Lotfian、Majid M. Heravi、Masoud Mirzaei、Mansoureh Daraie
DOI:10.1016/j.molstruc.2019.126953
日期:2020.1
Abstract Five Lindqvist-type lanthanopolyoxometalates ([Ln(W5O18)2]9–, Ln = La, Ce, Nd, Gd, Tb) complexes were prepared and fully characterized. Their basic catalytic activity was manipulated in the successful and high yielding synthesis of a series of pyrazolopyranopyrimidines via a four-component reaction, involving ethyl acetoacetate, hydrazine hydrate, benzaldehydes, and barbituric acid under ultrasonic
Tetramethylguanidine-functionalized nanosize γ-Al2O3 as a novel and efficient catalyst for the four-component synthesis of pyrazolopyranopyrimidine derivatives
作者:Mahnoush Keshavarz、Manouchehr Mamaghani、Mohammad G. Dekamin、Mohammad Nikpassand
DOI:10.1007/s13738-020-02123-6
日期:2021.6
trimethoxysilane with 1,1,3,3-tetramethylguanidine (TMG). The structure of the catalyst was characterized by various techniques including FT-IR, XRD, SEM, EDX and TGA analyses. The synthesized nanocatalyst was successfully used in an efficient and green four-component synthesis of pyrazolopyranopyrimidine derivatives using ethyl acetoacetate, hydrazine hydrate, arylaldehydes and barbituric acid (or thiobarbituric
Using magnetized water as a solvent for a green, catalyst-free, and efficient protocol for the synthesis of pyrano[2,3-c]pyrazoles and pyrano[4′,3′:5,6]pyrazolo [2,3-d]pyrimidines
A facile, eco-friendly, and highly efficient one-pot four-component protocol is demonstrated for the synthesis of the pyrano[2,3-c]pyrazole and pyrano[4′,3′:5,6]pyrazolo [2,3- d ]pyrimidine derivatives using magnetized water as a newgreen solvent. Simplicity, short reaction time, high yield, easy work-up, and absence of hazardous organic solvents are the main advantages of this method .
已证明一种简便,环保,高效的一锅四组分方案可用于合成吡喃并[2,3-c]吡唑和吡喃并[4',3':5,6]吡唑并[2, 3- d ]嘧啶衍生物,使用磁化水作为新的绿色溶剂。该方法的主要优点是操作简便,反应时间短,收率高,后处理简便且无有害有机溶剂。