id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
eurjchem-413	Kunkuma, Vijayalakshmi; Bethala, Lakshmi Anu Prabhavathi Devi; Bhongiri, Yadagiri; Rachapudi, Badari Narayana Prasad; Potharaju, Seetharamanjaneya Sai Prasad	An efficient synthesis of quinoxalines catalyzed by monoammonium salt of 12-tungstophosphoric acid	2011	4	.pdf	application/pdf	2649	153	64	3. Results and discussion Initially the reaction was conducted with benzil and 1,2‐ phenylenediamine (1:1 mmol) in acetonitrile at room temperature without using catalyst and obtained 2,3‐diphenyl quinoxaline in very low yield even after 24 h of reaction, whereas use of the monoammonium salt of 12‐TPA catalyst afforded the product in quantitative yield within 40 min. Different solvents with various polarity were screened (Table 1) for the condensation reaction in the presence of catalyst and found that all the solvents studied afforded the products in excellent yields with a slight variation in reaction period (15‐60 min). They are useful as acid and oxidation catalysts for various reactions since their catalytic features can be varied at molecular level [25‐27].	cache/eurjchem-413.pdf	txt/eurjchem-413.txt