An Efficient Synthesis of Benzothiazoles by Direct Condensation of Carboxylic Acids with 2-Aminothiophenol under Microwave Irradiation.

ChemInform ◽  
2004 ◽  
Vol 35 (33) ◽  
Author(s):  
Asit K. Chakraborti ◽  
C. Selvam ◽  
Gurmeet Kaur ◽  
Srikant Bhagat
Keyword(s):  
Microwave Irradiation ◽  
Carboxylic Acids ◽  
Efficient Synthesis ◽  
Direct Condensation

Facile and efficient synthesis of quinoline-4-carboxylic acids under microwave irradiation

2010 ◽  
Vol 21 (1) ◽  
pp. 35-38 ◽  
Author(s):  
Hui Zhu ◽  
Ri Fang Yang ◽  
Liu Hong Yun ◽  
Jin Li
Keyword(s):  
Microwave Irradiation ◽  
Carboxylic Acids ◽  
Efficient Synthesis

A New Aspect of the Pfitzinger Reaction: Microwave-assisted Synthesis of the New Heterocyclic Ring System 6-Arylbenzo[4,5]imidazolo[2,1-b]quino[4,3-e]-1,3-thiazin-14-one

2009 ◽  
Vol 64 (7) ◽  
pp. 826-830 ◽  
Author(s):  
Hatem A. Abdel-Aziz ◽  
Sobhi M. Gomha
Keyword(s):  
Microwave Irradiation ◽  
Carboxylic Acids ◽  
Heterocyclic Ring ◽  
Ring System ◽  
Conventional Heating ◽  
Microwave Assisted Synthesis ◽  
Efficient Synthesis ◽  
Pfitzinger Reaction ◽  
Microwave Assisted

We report herein on the utility of the Pfitzinger reaction in a facile two-step synthesis of the new heterocyclic ring system 6-arylbenzo[4,5]imidazolo[2,1-b]quino[4,3-e]-1,3-thiazin-14-one using microwave irradiation (MWI) and/or conventional heating. Microwave irradiation was used for a rapid and efficient synthesis of quinoline-4-carboxylic acids 6a - d from the reaction of isatin with 2-(1Hbenzimidazol- 2-ylthio)-1-arylethanones 3a - d. Cyclization of cinchoninic acids 6a - d afforded the fused title compounds 7a - d.

scholarly journals Rapid and Efficient Synthesis ofω-Alkylenediphosphoric Acids from Phosphorus Oxychloride

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Dalila Meziane ◽  
Abdelhamid Elias ◽  
Erwann Guénin
Keyword(s):  
Microwave Irradiation ◽  
Reaction Temperature ◽  
Phosphorus Oxychloride ◽  
Molar Ratio ◽  
Efficient Synthesis ◽  
Selective Method

The aim of this investigation was to develop an efficient, rapid, and selective method for the synthesis ofω-alkylenediphosphoric acids (HO)2(O)P-O-CH2n-O-P(O)(OH)2from reaction of several diols with phosphorus oxychloride. The reaction was investigated using three methodologies: (i) presence of a base, (ii) classical heating, and (iii) use of microwave irradiation. Influence of reaction temperature and molar ratio of reagents, as well as the nature of the solvent, was studied using these three different methods.

ChemInform Abstract: Green and High Efficient Synthesis of Triaza-benzo[b]fluoren-6-one Derivatives in Water under Microwave Irradiation.

ChemInform ◽  
2008 ◽  
Vol 39 (29) ◽  
Author(s):  
Qingqing Shao ◽  
Shujiang Tu ◽  
Chunmei Li ◽  
Longji Cao ◽  
Dianxiang Zhou ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Efficient Synthesis ◽  
High Efficient

Direct amidation of carboxylic acids with amines under microwave irradiation using silica gel as a solid support

2015 ◽  
Vol 17 (5) ◽  
pp. 3157-3163 ◽  
Author(s):  
Andrea Ojeda-Porras ◽  
Alejandra Hernández-Santana ◽  
Diego Gamba-Sánchez
Keyword(s):  
Fatty Acids ◽  
Microwave Irradiation ◽  
Carboxylic Acids ◽  
Silica Gel ◽  
Solid Support ◽  
Secondary Amines ◽  
Primary And Secondary Amines ◽  
Direct Amidation

A highly improved methodology for the direct amidation of carboxylic acids with amines using silica gel as a solid support and catalyst is described. Several examples using aliphatic, aromatic, unsaturated and fatty acids combined with primary and secondary amines are shown.

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