id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
eurjchem-1473	AlMarzouq, Douaa Salman; Zaky, Omniya Sayed; AlNajjar, Abdulaziz Abdulrazaq; Sadek, Kamal Usef	Pressure as effective green technology for synthesis of polyfunctionally substituted heteroaromatics: Synthesis of a variety of pyrazolo[1,5-a]pyrimidines	2016	5	.pdf	application/pdf	3098	173	70	We reported here a comparison between reaction of 4‐phenylazo‐3,5‐diaminopyrazole (4) with ethyl propiolate (15), dimethylacetylene dicarboxylate (20), diethyl fumarate (25) and benzylidenemalononitrile (11) in the presence of catalytic amount of piperidine. On other hand, reaction of 4‐arylazopyrazole‐3,5‐ diamines with arylidene malononitrile (11) and enaminones (13) in refluxing pyridine has been reported to afford 2,7‐ diamino‐5‐phenyl‐3‐(phenyldiazenyl)pyrazolo[1,5‐a]pyrimi‐ dine‐6‐carbonitrile (12) and 7‐aryl‐3‐(phenyldiazenyl)pyra‐ zolo[1,5‐a]pyrimidine (14) via initial attack at exocyclic amino function and cyclization (Scheme 1).	cache/eurjchem-1473.pdf	txt/eurjchem-1473.txt