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
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