Zinc oxide as a new, highly efficient, green, and reusable catalyst for microwave-assisted Michael addition of sulfonamides to α,β-unsaturated esters in ionic liquids

2007 ◽  
Vol 85 (6) ◽  
pp. 438-444 ◽  
Author(s):  
Abdolkarim Zare ◽  
Alireza Hasaninejad ◽  
Ahmad Reza Moosavi Zare ◽  
Abolfath Parhami ◽  
Hashem Sharghi ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Michael Addition ◽  
Catalytic Amount ◽  
Reusable Catalyst ◽  
Efficient Procedure ◽  
Unsaturated Esters ◽  
Microwave Assisted ◽  
Alkyl Derivatives ◽  
High Yields ◽  
Derivatives Of

A simple, clean, and efficient procedure for the green synthesis of some N-alkyl derivatives of sulfonamides is described. Microwave-assisted Michael addition of sulfonamides to α,β-unsaturated esters, in the presence of catalytic amount of zinc oxide (ZnO) in 1-butyl-3-methylimidazolium bromide ([bmim]Br), affords the title compounds in high yields and short reaction times.Key words: zinc oxide, green chemistry, microwave, Michael addition, sulfonamide, ionic liquid.

Zinc oxide-tetrabutylammonium bromide tandem as a highly efficient, green, and reusable catalyst for the Michael addition of pyrimidine and purine nucleobases to α,β-unsaturated esters under solvent-free conditions

2008 ◽  
Vol 86 (4) ◽  
pp. 317-324 ◽  
Author(s):  
Abdolkarim Zare ◽  
Alireza Hasaninejad ◽  
Mohammad Hassan Beyzavi ◽  
Abolfath Parhami ◽  
Ahmad Reza Moosavi Zare ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Michael Addition ◽  
Tetrabutylammonium Bromide ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
Efficient Procedure ◽  
Unsaturated Esters ◽  
Microwave Assisted ◽  
Solvent Free Conditions ◽  
The Michael Addition

An efficient procedure for the synthesis of carboacyclic nucleosides via microwave-assisted Michael addition of pyrimidine and purine nucleobases to α,β-unsaturated esters in the presence of catalytic amounts of zinc oxide (ZnO) and tetrabutylammonium bromide (TBAB) is described. The reactions proceed rapidly in good to excellent yields.Key words: ZnO–TBAB, green chemistry, Michael addition, nucleobase, solvent-free, microwave.

Zinc Oxide as a New, Highly Efficient, Green, and Reusable Catalyst for Microwave-Assisted Michael Addition of Sulfonamides to α,β-Unsaturated Esters in Ionic Liquids.

ChemInform ◽  
2007 ◽  
Vol 38 (50) ◽  
Author(s):  
Abdolkarim Zare ◽  
Alireza Hasaninejad ◽  
Ahmad Reza Moosavi Zare ◽  
Parhami Abolfath Parhami Abolfath ◽  
Hashem Sharghi ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Ionic Liquids ◽  
Michael Addition ◽  
Reusable Catalyst ◽  
Unsaturated Esters ◽  
Microwave Assisted ◽  
Highly Efficient

scholarly journals Cs2CO3/[bmim]Br as an Efficient, Green, and Reusable Catalytic System for the Synthesis of N-Alkyl Derivatives of Phthalimide under Mild Conditions

2008 ◽  
Vol 2008 ◽  
pp. 1-4 ◽  
Author(s):  
Alireza Hasaninejad ◽  
Abdolkarim Zare ◽  
Ahmad Reza Moosavi-Zare ◽  
Fatemeh Khedri ◽  
Rahimeh Rahimi ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Catalytic System ◽  
Reaction Times ◽  
Catalytic Amount ◽  
Conjugate Addition ◽  
Reaction Conditions ◽  
Mild Conditions ◽  
Alkyl Derivatives ◽  
High Yields ◽  
Derivatives Of

Aza-conjugate addition of phthalimide to α,β-unsaturated esters efficiently achieves in the presence of catalytic amount of Cs2CO3 and ionic liquid 1-butyl-3-methylimidazolium bromide ([bmim]Br) under mild reaction conditions (70°C) to afford N-alkyl phthalimides in high yields and relatively short reaction times.

Microwave-assisted N-nitroarylation of some pyrimidine and purine nucleobases

2006 ◽  
Vol 84 (7) ◽  
pp. 979-985 ◽  
Author(s):  
Ali Khalafi-Nezhad ◽  
Abdolkarim Zare ◽  
Abolfath Parhami ◽  
Mohammad Navid Soltani Rad ◽  
Gholam Reza Nejabat
Keyword(s):  
Efficient Procedure ◽  
Microwave Assisted ◽  
High Yields ◽  
Derivatives Of

An efficient procedure for the synthesis of some N-nitroaryl derivatives of nucleobases via microwave-assisted N-nitroarylation of nucleobases in the presence of SiO2 and Cs2CO3 in DMSO, as the homogenizing solvent, is described. In this method, some pyrimidine and purine nucleobases are nitroarylated regioselectively in moderate to high yields and short reaction times.Key words: microwave, N-nitroarylation, pyrimidine, purine, SNAr.

p-Toluenesulfonic Acid Coated Natural Phosphate as an Efficient Catalyst for the Synthesis of 2-Substituted Benzimidazole

2018 ◽  
Vol 42 (12) ◽  
pp. 614-617
Author(s):  
Soumia Belkharchach ◽  
Hanane Elayadi ◽  
Hana Ighachane ◽  
Said Sebti ◽  
Mustapha Ait Ali ◽  
...  
Keyword(s):  
Environmentally Friendly ◽  
Catalytic Amount ◽  
Reusable Catalyst ◽  
Efficient Catalyst ◽  
Natural Phosphate ◽  
Mild Conditions ◽  
Toluenesulfonic Acid ◽  
High Yields

2-Substituted benzimidazoles are selectively synthesised in high yields via the condensation of o-phenylenediamine derivatives with aldehyde derivatives using catalytic amount of p-toluenesulfonic acid coated natural phosphate (NP/PTSA) under mild conditions. The use of NP/PTSA as a reusable catalyst makes this process simple, convenient, and environmentally friendly.

Nano-NiFe2O4 catalyzed microwave assisted one-pot regioselective synthesis of novel 2-alkoxyimidazo[1,2-a]pyridines under aerobic conditions

RSC Advances ◽  
2016 ◽  
Vol 6 (15) ◽  
pp. 12402-12407 ◽  
Author(s):  
Soumen Payra ◽  
Arijit Saha ◽  
Subhash Banerjee
Keyword(s):  
Michael Addition ◽  
Regioselective Synthesis ◽  
Reusable Catalyst ◽  
One Pot ◽  
Aerobic Conditions ◽  
Microwave Assisted ◽  
Ligand Transfer

Here, we have demonstrated regioselective synthesis of novel 2-alkoxy-3-arylimidazo[1,2-a]pyridines using nano-NiFe2O4 as reusable catalyst via one-pot sequential aza-Michael addition, Fe-promoted ligand transfer and C–H imination reactions.

scholarly journals P2O5/SiO2as a New, Efficient and Reusable Catalyst for Preparation of 4,4′-Epoxydicoumarins Under Solvent-free Conditions

2011 ◽  
Vol 8 (4) ◽  
pp. 1626-1631 ◽  
Author(s):  
Liqiang Wu ◽  
Xiao Wang
Keyword(s):  
Silica Gel ◽  
Low Cost ◽  
Reaction Times ◽  
Catalytic Amount ◽  
Phosphorus Pentoxide ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
Solvent Free Conditions ◽  
High Yields

An efficient solvent-free procedure for the preparation of 4,4′-epoxydicoumarins via the ondensation of 4-hydroxycoumarin with aldehydes in the presence of catalytic amount of phosphorus pentoxide/silica gel at 110°C is described. The advantages of this method are generality, high yields, short reaction times, ease of product isolation, low cost and ecologically friendly.

ChemInform Abstract: Microwave-Assisted Michael Addition of Amides to α,β-Unsaturated Esters under Solvent-Free Conditions.

ChemInform ◽  
2008 ◽  
Vol 39 (36) ◽  
Author(s):  
A. Zare ◽  
A. Hasaninejad ◽  
A. Parhami ◽  
A. R. Moosavi Zare ◽  
A. Khalafi-Nezhad
Keyword(s):  
Michael Addition ◽  
Solvent Free ◽  
Unsaturated Esters ◽  
Microwave Assisted ◽  
Solvent Free Conditions
Sign in / Sign up

Export Citation Format

Share Document