pot, three component synthesis of 2-amino-4-aryl-3,5-dicyano-6-sulfanylpyridines and the corresponding 1,4-dihydropyridines are from readily accessible starting materials is described. Simply heating of an ethanolic solution of structurally diverse aldehydes with various thiols and malononitrile in the presence of nanocrystalline magnesium oxide provides the highly substituted pyridine derivatives
Facile and Rapid Access to Poly Functionalized Pyridine Derivatives
作者:Pravin V. Shinde、Bapurao B. Shingate、Murlidhar S. Shingare
DOI:10.1002/cjoc.201190178
日期:2011.5
An efficient and greener protocol for the synthesis of poly functionalized pyridines using tetra‐n‐butyl ammonium fluoride (TBAF) in water is established. Remarkable advantages of the present synthetic strategy over the others are shorter reaction times, higher isolated yields, reuse of catalytic system, simple work‐up procedure and more especially its applicability to heteryl and aliphatic aldehydes
Boric acid catalyzed convenient synthesis of 2-amino-3,5-dicarbonitrile-6-thio-pyridines in aqueous media
作者:Pravin V. Shinde、Swapnil S. Sonar、Bapurao B. Shingate、Murlidhar S. Shingare
DOI:10.1016/j.tetlet.2009.12.146
日期:2010.3
A one-pot three-component condensation of an aldehyde, malononitrile, and thiophenol has been achieved by conventional and ultrasound method. The reaction has been catalyzed by boric acid in aqueous medium. This protocol afforded corresponding 2-amino-3,5-dicarbonitrile-6-thio-pyridines in shorter reaction times and high yields with the green aspects by avoiding toxic catalysts and solvents.
Sodium chloride: a proficient additive for the synthesis of pyridine derivatives in aqueous medium
作者:Jitendra B. Gujar、Mahendra A. Chaudhari、Deepak S. Kawade、Murlidhar S. Shingare
DOI:10.1016/j.tetlet.2014.10.125
日期:2014.12
A facile and convenient synthesis of substituted pyridinederivatives catalysed by NaCl in the presence aqueousmedia under reflux and ultrasound irradiation has been developed via a one-pot multicomponent reaction, in which four new bonds were formed. Particularly valuable features of this protocol including mild conditions, simple execution, broad substrate scope and good yields of products make
Aqueous Suspension of Basic Alumina: An Efficient Catalytic System for the Synthesis of Poly Functionalized Pyridines
作者:Pravin V. Shinde、Bapurao B. Shingate、Murlidhar S. Shingare
DOI:10.5012/bkcs.2011.32.2.459
日期:2011.2.20
In the present work, catalytic activity of basic alumina in water has been demonstrated for the synthesis of poly functionalized pyridines. This strategy has some remarkable advantages, such as use of heterogeneous catalyst in aqueous media, reusability of catalyst and scalable approach.