Ultrasound promoted synthesis of thioesters from 2-mercaptobenzoxa(thia)zoles

Abstract

An ultrasound-enhanced method has been developed for the synthesis of a variety of thioesters from benzoyl chlorides and 2-mercaptobenzoxa(thia)zoles. Applying this methodology, 14 compounds were synthesized in excellent yields.

New Nanocomposite Derivatives From Thiadiazole Polymers /Silica Synthesis and Characterization using Free Radical Polymerization

“…Then 2.08 g, 0.02 mol of methacryloyl chloride was added drop wise with stirring in (0°C) for 5 hours. To the cold mixture 50 mL of ice water was add, the precipitate was filtered, washed by water and dried at room temperature [16].…”

Green synthesis of 4-methoxybenzylidene thiazole derivatives using potassium carbonate as base under ultrasound irradiation

“…32,33 Ultrasonic irradiation has been acknowledged as an innocuous, green technique and its application today has been a boon in serving a new pathway for several chemical processes like reagent activation in the synthesis of organic and inorganic compounds. 34 In view of the above considerations and in continuation of our previous work on thiazoles, thiazolidinones and sulphonamide derivatives of pharmaceutical interest, [35][36][37][38][39][40][41][42][43][44][45][46][47] we wish to report a simple, mild, competent and environmentally benign method for the synthesis and characterization of novel rhodanine derivatives 3, 4 and 6a-l by ultrasound irradiation and conventional technique via potassium carbonate catalyzed in water media.…”

Ultrasound Promoted Green Synthesis of Chalcones of 3-Acetylcoumarin

“…In the continuation of our work on the development of green and efficient route for the synthesis of heterocyclic compounds we wish to report our efforts toward green and efficient RESEARCH ARTICLE synthesis of coumarinyl chalcone using dual frequency ultrasonication. Ultrasound assisted organic synthesis is a greener approach of synthesis and a powerful technique that is being used to enhance the so many organic reactions like synthesis of oxime 16 , 1,2,4-oxadiazole 17 , pyrazoles 18 , isoxazoles 19 , thioazolidiones 20 , pyrimidines 21 , imidazolines 22 , benzoxazoline 23 , polycyclic-4-aryl-3 methyl-4, 7-dihydro-1H-pyrazolo [3,4-b] pyridines 24 , 1,2,4 triazole 25 etc.…”