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Y(NO3)3·6H2O: A novel and reusable catalyst for one pot synthesis of 3,4-dihydropyrimidin-2(1H)-ones under solvent-free conditions

✍ Scribed by Nitin S. Nandurkar; Mayur J. Bhanushali; Malhari D. Bhor; Bhalchandra M. Bhanage

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
194 KB
Volume
271
Category
Article
ISSN
1381-1169

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✦ Synopsis

Yttrium(III) nitrate hexahydrate [Y(NO 3 ) 3 .6H 2 O] as a catalyst for organic reaction is described for the first time. The catalytic activity is demonstrated using Biginelli reaction as a model under solvent-free conditions. Excellent yields of dihydropyrmidinones are obtained at 70 • C within a short reaction time (10-50 min) and the catalyst is also recyclable. Other advantages over the classical method include greater substrate compatibility, faster reaction rates and easy workup procedures.

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TiO2 as a Reusable Catalyst for the One-
TiO2 as a Reusable Catalyst for the One-Pot Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones under Solvent-Free Conditions
✍ Mohammad Zaman Kassaee; Hassan Masrouri; Farnaz Movahedi; Reza Mohammadi 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 German ⚖ 131 KB 👁 1 views

## Abstract An efficient solvent‐free method for the synthesis of various 3,4‐dihydropyrimidin‐2(1__H__)‐ones using TiO~2~ as a recyclable heterogeneous catalyst is described. Compared to known methods, satisfactory results are obtained with excellent yields, short reaction times, and simplicity in