Literature DB >> 19720550

A convenient ultrasound-promoted regioselective synthesis of fused polycyclic 4-aryl-3-methyl-4,7-dihydro-1H-pyrazolo[3,4-b]pyridines.

Mohammad Nikpassand1, Manouchehr Mamaghani, Farhad Shirini, Khalil Tabatabaeian.   

Abstract

Fused polycyclic 4-aryl-3-methyl-4,7-dihydro-1H-pyrazolo[3,4-b]pyridines were obtained in a three-component regioselective reaction of 5-amino-3-methyl-1H-pyrazole, 2H-indene-1,3-dione and arylaldehydes in ethanol under ultrasound irradiation. This rapid method produced the products in short reaction times (4-5min) and excellent yields (88-97%).

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Year:  2009        PMID： 19720550     DOI： 10.1016/j.ultsonch.2009.08.001

Source DB:  PubMed          Journal:  Ultrason Sonochem        ISSN： 1350-4177            Impact factor:   7.491


  3 in total

Review 1.  Recent developments in utility of green multi-component reactions for the efficient synthesis of polysubstituted pyrans, thiopyrans, pyridines, and pyrazoles.

Authors:  Mohamed Hilmy Elnagdi; Moustafa Sherief Moustafa; Saleh Mohammed Al-Mousawi; Ramadan Ahmed Mekheimer; Kamal Usef Sadek
Journal:  Mol Divers       Date:  2015-04-17       Impact factor: 2.943

Review 2.  Sonochemical Protocols for Heterocyclic Synthesis: A Representative Review.

Authors:  Meena Devi; Rahul Singh; Jayant Sindhu; Ashwani Kumar; Sohan Lal; Ramesh Kumar; Khalid Hussain; Megha Sachdeva; Devender Singh; Parvin Kumar
Journal:  Top Curr Chem (Cham)       Date:  2022-02-12

Review 3.  5-Aminopyrazole as precursor in design and synthesis of fused pyrazoloazines.

Authors:  Ranjana Aggarwal; Suresh Kumar
Journal:  Beilstein J Org Chem       Date:  2018-01-25       Impact factor: 2.883
  3 in total

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