Microwave Irradiation in Solvent-Free Conditions: Preparation of 2-Substituted-4(3H)-quinazolinones by Heterocyclization of 2-Aminobenzamide with Carboxylic Acids.

ChemInform ◽  
2004 ◽  
Vol 35 (28) ◽  
Author(s):  
M. Rahimizadeh ◽  
Z. Tavallai ◽  
M. Bakavoli
Keyword(s):  
Microwave Irradiation ◽  
Carboxylic Acids ◽  
Solvent Free ◽  
Solvent Free Conditions

Hydrolysis of amides to carboxylic acids using phthalic anhydride under microwave irradiation and solvent-free conditions

2005 ◽  
Vol 2005 (2) ◽  
pp. 119-120 ◽  
Author(s):  
Majid M. Heravi ◽  
Dordaneh Zargarani ◽  
Rahim Hekmat Shoar ◽  
Shahnaz Khaleghi
Keyword(s):  
Microwave Irradiation ◽  
Carboxylic Acids ◽  
Phthalic Anhydride ◽  
Solvent Free ◽  
Solvent Free Conditions ◽  
High Yields ◽  
Hydrolysis Of

Amides efficiently and rapidly give carboxylic acids in high yields upon reaction with phthalic anhydride under microwave irradiation in the absence of solvent.

scholarly journals Investigation on the reactivity of α-azidochalcones with carboxylic acids: Formation of α-amido-1,3-diketones and highly substituted 2-(trifluoromethyl)oxazoles

2015 ◽  
Vol 11 ◽  
pp. 2021-2028 ◽  
Author(s):  
Kandasamy Rajaguru ◽  
Arumugam Mariappan ◽  
Rajendran Suresh ◽  
Periasamy Manivannan ◽  
Shanmugam Muthusubramanian
Keyword(s):  
Microwave Irradiation ◽  
Carboxylic Acids ◽  
Trifluoroacetic Acid ◽  
Solvent Free ◽  
Solvent Free Conditions ◽  
In Situ Formation ◽  
Lower Temperature

The reaction of α-azidochalcones with carboxylic acids has been investigated resulting in the formation of α-amido-1,3-diketones under microwave irradiation via in situ formation of 2H-azirine intermediates. An interesting reaction is described wherein, with trifluoroacetic acid at lower temperature, it affords highly substituted 2-(trifluoromethyl)oxazoles. These flexible transformations proceed under solvent free conditions in good to excellent yields without any catalyst.

scholarly journals Tandem Fries Reaction–Conjugate Addition under Microwave Irradiation in Dry Media; One-pot Synthesis of Flavanones

1999 ◽  
Vol 23 (9) ◽  
pp. 574-575
Author(s):  
Firouz Matloubi Moghaddam ◽  
Mohammad Ghaffarzadeh ◽  
Seyed Hossein Abdi-Oskoui
Keyword(s):  
Microwave Irradiation ◽  
Silica Gel ◽  
Conjugate Addition ◽  
Solvent Free ◽  
Naphthalene Derivatives ◽  
One Pot ◽  
Fries Rearrangement ◽  
One Pot Synthesis ◽  
Solvent Free Conditions ◽  
Fries Reaction

An AICl3–ZnCl2 mixture supported on silica gel is found to be an efficient medium for the Fries rearrangement of acyloxybenzene or naphthalene derivatives in solvent-free conditions under microwave irradiation.

scholarly journals TMSOTf-catalyzed synthesis of trisubstituted imidazoles using hexamethyldisilazane as a nitrogen source under neat and microwave irradiation conditions

RSC Advances ◽  
2021 ◽  
Vol 11 (45) ◽  
pp. 28061-28071
Author(s):  
Kesatebrhan Haile Asressu ◽  
Chieh-Kai Chan ◽  
Cheng-Chung Wang
Keyword(s):  
Microwave Irradiation ◽  
Nitrogen Source ◽  
Microwave Heating ◽  
Solvent Free ◽  
Solvent Free Conditions

Trisubstituted imidazoles are synthesized efficiently from the readily available 1,2-diketones and aldehydes using hexamethyldisilazane as a new and stable nitrogen source under TMSOTf-catalysis system, microwave heating and solvent-free conditions.

Microwave-assisted synthesis of quinolones and 4H-1,4-benzo thiazine 1,1-dioxides

2005 ◽  
Vol 2005 (1) ◽  
pp. 27-28 ◽  
Author(s):  
Jaime Charris ◽  
Arthur Barazarte ◽  
José Domínguez ◽  
Neira Gamboa
Keyword(s):  
Microwave Irradiation ◽  
Rapid Method ◽  
Solvent Free ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Solvent Free Conditions

A rapid method for the preparation of N-aryl-2-methylthio-4-oxo-1,4-dihydro quinoline-3-carbonitriles (2a–e) and N-aryl-3-methylthio-4H-1,4-benzothiazine-2-carbonitrile 1,1-dioxides (2f–o) is reported. The cyclization is accelerated by microwave irradiation under solvent free conditions in the presence of K2CO3.

Lawesson′s Reagent and Microwaves: A New Efficient Access to Benzoxazoles and Benzothiazoles from Carboxylic Acids under Solvent-Free Conditions.

ChemInform ◽  
2007 ◽  
Vol 38 (24) ◽  
Author(s):  
Julio A. Seijas ◽  
M. Pilar Vazquez-Tato ◽  
M. Raquel Carballido-Reboredo ◽  
Jose Crecente-Campo ◽  
Lucia Romar-Lopez
Keyword(s):  
Carboxylic Acids ◽  
Solvent Free ◽  
Efficient Access ◽  
Solvent Free Conditions
Sign in / Sign up

Export Citation Format

Share Document