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

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

Synlett ◽  
2007 ◽  
Vol 2007 (2) ◽  
pp. 0313-0317 ◽  
Author(s):  
Julio Seijas ◽  
M. Vázquez-Tato ◽  
M. Carballido-Reboredo ◽  
José Crecente-Campo ◽  
Lucía Romar-López
Keyword(s):  
Carboxylic Acids ◽  
Solvent Free ◽  
Lawesson’S Reagent ◽  
Efficient Access ◽  
Solvent Free Conditions ◽  
Lawesson's Reagent

scholarly journals Reaction of Carboxylic Acids with Vinyl Ethers under Solvent-free Conditions Using Molecular Iodine as a Catalyst

2013 ◽  
Vol 62 (1) ◽  
pp. 29-38 ◽  
Author(s):  
Yohko Hanzawa ◽  
Yoshio Kasashima ◽  
Kahoko Hashimoto ◽  
Tatsuhiro Sasaki ◽  
Keita Tomisaki ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Molecular Iodine ◽  
Solvent Free ◽  
Vinyl Ethers ◽  
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.

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