Reactions of 6-aminouracils — A novel and highly efficient procedure for preparation of some new spiro pyridodipyrimidines under classical or microwave-assisted solvent-free conditions

2008 ◽  
Vol 86 (9) ◽  
pp. 925-929 ◽  
Author(s):  
Mohammad R Mohammadizadeh ◽  
Javad Azizian ◽  
Fatemeh Teimouri ◽  
Ali A Mohammadi ◽  
Ali R Karimi ◽  
...  
Keyword(s):  
Solvent Free ◽  
Efficient Procedure ◽  
Microwave Assisted ◽  
Highly Efficient ◽  
Solvent Free Conditions ◽  
Isatin Derivatives

A versatile and highly efficient procedure has been introduced for preparation of spiro pyridodipyrimidines during the investigation of the reaction of 1,3-dimethyl-6- aminouracil with isatin derivatives, ninhydrin, and acenaphthoquinone under classical or microwave-assisted solvent-free conditions.Key words: isatin, ninhydrin, acenaphtoquinone, 1,3-dimethyl-6-aminouracil, solvent-free.

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.

A highly efficient procedure for the oxathioacetalization of carbonyl compounds under solvent-free conditions

2009 ◽  
Vol 52 (12) ◽  
pp. 2166-2170 ◽  
Author(s):  
XueZheng Liang ◽  
Lu Chen ◽  
HaiHong Wu ◽  
JianGuo Yang ◽  
MingYuan He
Keyword(s):  
Carbonyl Compounds ◽  
Solvent Free ◽  
Efficient Procedure ◽  
Highly Efficient ◽  
Solvent Free Conditions

Nano zirconia catalysed one-pot synthesis of some novel substituted imidazoles under solvent-free conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (36) ◽  
pp. 28163-28170 ◽  
Author(s):  
Shivam Bajpai ◽  
Sundaram Singh ◽  
Vandana Srivastava
Keyword(s):  
Multicomponent Reaction ◽  
Efficient Method ◽  
Ammonium Acetate ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
One Pot ◽  
Highly Efficient ◽  
One Pot Synthesis ◽  
Solvent Free Conditions ◽  
Isatin Derivatives

A highly efficient method for the synthesis of substituted imidazoles from a multicomponent reaction of isatin derivatives with ammonium acetate and aromatic aldehydes under solvent-free conditions has been established.

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