An Efficient Regiospecific Synthesis of Highly Functionalized Novel Dihydropyrimido[4,5-d]pyrimidine Derivatives by a Three-Component One-Pot Condensation under Solvent-Free Conditions.

ChemInform ◽  
2007 ◽  
Vol 38 (28) ◽  
Author(s):  
Dipak Prajapati ◽  
Kalyan Jyoti Borah ◽  
Mukut Gohain
Keyword(s):  
Solvent Free ◽  
Pyrimidine Derivatives ◽  
One Pot ◽  
Solvent Free Conditions ◽  
One Pot Condensation

Synthesis of 4-selenylidene-4H,5H-chromeno[3,4-e][1,3]oxazin-5-one

2017 ◽  
Vol 41 (8) ◽  
pp. 452-454 ◽  
Author(s):  
Rahele Zhiani
Keyword(s):  
Ambient Temperature ◽  
Solvent Free ◽  
Efficient Synthesis ◽  
One Pot ◽  
Acyl Chlorides ◽  
Solvent Free Conditions ◽  
One Pot Condensation

A green and efficient synthesis of [1,3]oxazines has been achieved via a three-component, one-pot condensation of 4-hydroxycoumarin, potassium selenocyanate and acyl chlorides in the presence of N-methylimidazole under solvent-free conditions at ambient temperature.

scholarly journals Zr(HSO4)4: An Efficient Catalyst for the Synthesis of 3-(2'- Benzothiazolyl)-2,3-dihydroquinazolin- 4(1H)-ones

2012 ◽  
Vol 9 (2) ◽  
pp. 739-743 ◽  
Author(s):  
Liqiang Wu
Keyword(s):  
Solvent Free ◽  
Isatoic Anhydride ◽  
Efficient Synthesis ◽  
One Pot ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
One Pot Condensation ◽  
The One

A simple and efficient synthesis of 3-(2'-benzothiazolyl)-2,3-dihydro quinazolin-4(1H)- ones has been accomplished by the one-pot condensation of isatoic anhydride, aldehyde and 2-aminobenzothiazole under solvent-free conditions in the presence of Zr(HSO4)4.

scholarly journals Efficient Synthesis of 1-Amidoalkyl-2-Naphthols by One-Pot, Three-Component Reaction under Solvent-Free Conditions

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Zahed Karimi-Jaberi ◽  
Marziyeh Jokar ◽  
S. Zoleykha Abbasi
Keyword(s):  
Trichloroacetic Acid ◽  
Reaction Times ◽  
Solvent Free ◽  
Efficient Synthesis ◽  
One Pot ◽  
Solvent Free Conditions ◽  
Three Component Reaction ◽  
One Pot Condensation ◽  
High Yields ◽  
Free Media

Two efficient and direct procedures have been developed for the preparation of 1-amidoalkyl-2-naphthols by a one-pot condensation of aldehydes, 2-naphthol, and amides in the presence of trichloroacetic acid or cobalt (II) chloride as catalyst. The reactions were carried out under solvent-free media. High yields, short reaction times, easy workup of the catalyst are advantages of these procedures.

scholarly journals One-Pot Synthesis of Benzoxanthenes in Solvent Free Condition using Chloroaluminate Ionic Liquids as Catalyst

2009 ◽  
Vol 5 (1) ◽  
pp. 575-580
Author(s):  
Sugat Kirti ◽  
Dhanraj T. Masram
Keyword(s):  
Ionic Liquid ◽  
Reaction Times ◽  
Catalytic Amount ◽  
Solvent Free ◽  
Imidazolium Chloride ◽  
One Pot ◽  
Free Condition ◽  
Solvent Free Condition ◽  
Solvent Free Conditions ◽  
One Pot Condensation

A mild and efficient method has been developed for the preparation of 14-aryl-14H dibenzo[a,j]xanthenes from one-pot condensation of aldehydes with β-naphthol using catalytic amount of Chloroaluminate ionic liquid (imidazolium chloride·3AlCl3 or pyridiniumchloride·3AlCl3) under thermal solvent-free conditions. Excellent yields, short reaction times, easy workup and reusability of the catalyst as well as solvent free conditions are advantages of this procedure.

Synthesis of 1,2,4-triazole-3-selenones via three-component reaction between benzohydrazide, potassium selenocyanate and acyl chlorides under solvent-free conditions

2017 ◽  
Vol 41 (8) ◽  
pp. 455-456 ◽  
Author(s):  
Rahele Zhiani
Keyword(s):  
Ambient Temperature ◽  
Solvent Free ◽  
Efficient Synthesis ◽  
One Pot ◽  
Acyl Chlorides ◽  
Solvent Free Conditions ◽  
Three Component Reaction ◽  
One Pot Condensation

A green and efficient synthesis of 1,2,4-triazole-3-selenones has been achieved via a three-component, one-pot condensation of benzohydrazide, potassium selenocyanate and acyl chlorides under solvent-free conditions at ambient temperature with good yields.

A regio- and stereoselective three-component synthesis of 5-(trifluoromethyl)-4,5,6,7-tetrahydro-[1,2,4]triazolo[1,5-a]pyrimidine derivatives under solvent-free conditions

2011 ◽  
Vol 65 (4) ◽  
Author(s):  
Abbas Rahmati
Keyword(s):  
Aromatic Aldehyde ◽  
Stereoselective Synthesis ◽  
Condensation Reaction ◽  
Solvent Free ◽  
Pyrimidine Derivatives ◽  
One Pot ◽  
Catalyst Free ◽  
Solvent Free Conditions

AbstractAn efficient one-pot method for regio- and stereoselective synthesis of 5-(trifluoromethyl)-4,5,6,7-tetrahydro-[1,2,4]triazolo[1,5-a]pyrimidines under solvent-free and catalyst-free conditions has been developed. The method involves employing a three-component condensation reaction of an aromatic aldehyde and ethyl 4,4,4-trifluoro-3-oxobutanoate or 1,1,1-trifluoropentane-2,4-dione in the presence of 1,2,4-triazol-3-amine at 90°C.

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