One-Pot Synthesis of Pyrrolo[1,2-a]quinoxaline Derivatives through Copper-Catalyzed Cascade Reactions

Abstract

A simple, efficient, inexpensive one-pot method for the pyrrolo[1,2-a]quinoxaline derivatives synthesized from 2-formylazoles and o-aminoiodoarenes was developed by using cheap CuI as catalyst, inexpensive and readily available 2,2'-bipyridine as ligand at 110 ℃. The reaction provides an efficient protocol to a series of pyrrolo[1,2-a]quinoxaline derivatives in good to high yields, and benefits of readily available catalyst and synthesis of high efficiency.

Microwave-assisted one-pot synthesis and performance test of novel thiadiazole derivatives as an inhibitor of oil transportation pipelines

“…Organic corrosion inhibition is the most effective and flexible means of protecting the severe internal corrosion of carbon steel pipelines in oil product transportation (Xiao et al, 2008;Xu et al, 2013;Qin et al, 2010;Dong et al, 2011). Since it was found that imidazoline based on inhibitors has a highly inhibition ability in acidic media, it is widely used to minimize carbon dioxide-induced corrosion in the oil and gas industry (Jiang et al, 2014). But the imidazoline ring structure is thermally unstable at high temperature (Ke et al, 2014).…”