Over the last decade, polyethylene glycol (PEG) has emerged as a green and inexpensive
catalyst as well as a solvent in a number of chemical transformations. It serves as a stable …

Various heterocyclic systems based on natural and unnatural biologically active products
were synthesized by Brønsted acid-promoted cyclization. We have made an attempt to …

This review summarizes data on the synthesis of important aromatic core [1, 2, 4]
triazolopyridines. The presented methods are classified according to the types of reagents …

Herein, we developed a convenient and efficient method via protonation of p-toluenesulfonic
acid promoted cyclocondensation of o-phenylenediamine and aldehydes for selectively …

Since the beginning of this century, p-toluenesulfonic acid (p-TSA) catalyzed organic
transformations have been an active area of research in pursuit of developing efficient …

An iodine-catalyzed formation of substituted 2-aminobenzothiazole derivatives is herein
described using hydrogen peroxide as an oxidant in PEG400. The method enabled an …

Trypanosoma cruzi and Trypanosoma brucei are the parasitic causative agents of Chagas
disease and human African trypanosomiasis (HAT), respectively. The drugs currently used …

Use of safer solvents satisfies green chemistry practices. From the green chemistry
perspective the best solvent for reactions is no solvent. However, this ideal situation is not …

Abstract A number of pyrido (2, 3‐c) coumarin derivatives were accomplished from various 3‐
aminocoumarins and phenylacetaldehydes in acetonitrile using 10 mol% p‐toluenesulfonic …

Benzimidazole (BI) and derivatives are interesting because several of these compounds
have been found to have a diversity of biological activities with clinical applications. In view …