[bmim(SO 3 H)][OTf]/[bmim][X] and Zn(NTf 2 ) 2 /[bmim][X] (X = PF 6 and BF 4 ); efficient catalytic systems for the synthesis of tetrahydropyrimidin-ones (-thiones) via the Biginelli reaction
作者:Hemantkumar M. Savanur、Rajesh G. Kalkhambkar、Gopalakrishnan Aridoss、Kenneth K. Laali
DOI:10.1016/j.tetlet.2016.05.103
日期:2016.7
facile, high yielding, and simple method for the synthesis of a library of dihydropyrimidinones (and -thiones) via the one-pot Biginelli reaction of aldehydes is reported. The method employs the Brønsted acidic IL [bmim(SO3H][OTf] or Zn(NTf2)2 as catalyst along with the readily available imidazolium-ILs as solvent, and exhibits good potential for the recycling and reuse of the IL solvent.
Nickel Nanoparticles: An Ecofriendly and Reusable Catalyst for the Synthesis of 3,4-Dihydropyrimidine-2(1H)-ones via Biginelli Reaction
作者:Suryakant B. Sapkal、Kiran F. Shelke、Bapurao B. Shingate、Murlidhar S. Shingare
DOI:10.5012/bkcs.2010.31.02.351
日期:2010.2.20
Nickel nanoparticles (Ni NPs) appeared to exhibit the catalytic activity in one-pot cyclocondensation reaction for the preparation of 3,4-dihydropyrimidine-2(1H)-ones via Biginelli reaction from aromatic/heteroaromatic/aliphatic aldehydes, urea/thiourea and ethyl acetoacetate under microwave irradiation has been described. The UV absorbance spectra showed metallic Ni characteristics and appreciate with the particle size determined by Transmission electron microscopy (TEM). After reaction course the Ni NPs can be re-covered and reused without any apparent loss of activity.
Larvicidal study of tetrahydropyrimidine scaffolds against<i>Anopheles arabiensis</i>and structural insight by single crystal X-ray studies
作者:Keshab M. Bairagi、Katharigatta N. Venugopala、Pradip Kumar Mondal、Raquel M. Gleiser、Deepak Chopra、Daniel García、Bharti Odhav、Susanta K. Nayak
DOI:10.1111/cbdd.13351
日期:2018.12
against Anopheles arabiensis. These newly synthesized compounds were characterized by spectral studies such as FT‐IR, NMR (1H and 13C), LC‐MS, and elemental analysis. The conformational features and supramolecular assembly of molecules 4a, 4b, and 4e were further analyzed from single crystalX‐ray study. The larvicidal activity of these tetrahydropyrimidine pharmacophore series was analyzed based on
1,4-Diazabicyclo[2.2.2]octanium Diacetate: As a New, Effective and Reusable Catalyst for the Synthesis of 3,4- dihydropyrimidin-2(1H)-ones and -Thiones
作者:Leila Zare Fekri、Mahsa Movaghari
DOI:10.2174/1570178613666160524160125
日期:2016.9.21
In this study, a new, effective and environmentally benign procedure for the synthesis of dihydropyrimidinone and thione derivatives with various benzaldehydes, urea or thiourea, and ethyl acetoacetate in the presence of 1,4-diazabicyclo[2.2.2]octanium diacetate as a novel acidic ionic liquid, in high yield and short reaction time is reported. This method provides several advantages such as easy work-up
Fe+3-montmorillonite K10: As an effective and reusable catalyst for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones and –thiones
作者:L. Z. Fekri、M. Nikpassand、M. Movaghari
DOI:10.4314/bcse.v31i2.12
日期:——
In this study, a novel, clean, convenient, appropriate and environmentally benign route to dihydropyrimidinone and thione derivatives has been developed using the reaction between various benzaldehydes, urea or thiourea, and ethyl acetoacetate in the presence of Fe +3 -montmorillonite K10 under grind condition. The present methodology has several advantages such as simple work-up, solvent-free conditions