Synthesis of Some Novel Bis(pyrazole), Bis(pyridine) and Bis(pyrazolo[5,1-c]-1,2,4-triazine Derivatives
作者:Nabila A. Kheder
DOI:10.3987/com-09-11676
日期:——
Treatment of N,N'-(ethane-1,2-dlyl)bis(cyanoacetamide) (1) with hydrazonoyl chlorides 2a,b afforded bis(arninopyrazoles) 5a,b. Heating of compound 1 with arylmethylenepropanedinitrile 9a-c afforded bis(pyridine) derivatives 13a-c. Also, compound 1 coupled smoothly with the arenediazonium salt generated from 3-chloroaniline or 5-amino-4-methyl-3-phenylpyrazole (16) to afford the corresponding hydrazones 15 or bis(pyrazolo[5,1-c]-1,2,4-triazine-3-carboxamide) 19. Refluxing of compound I with N,N-dimethylformamide dimethyl acetal (DMF-DMA) in xylene afforded bis(2-cyano-3-(dimethylamino)-acrylamide) (20) which reacted with hydrazine hydrate to afford the novel bis(cyanoopyrazole) 23.
New Bis(dihydropyridine-3,5-dicarbonitrile) Derivatives: Green Synthesis and Cytotoxic Activity Evaluation
作者:Amr M. Abdelmoniem、Taher A. Salaheldin、Ismail A. Abdelhamid、Ahmed H. M. Elwahy
DOI:10.1002/jhet.2867
日期:2017.9
A synthesis of bis(dihydropyridine‐3,5‐dicarbonitrile) by a three‐component reaction of one equivalent of bis‐cyanoacetamides with two equivalents of both arylaldehydes and malononitrile in ethanol‐containing piperidine is reported. Bis‐cyanopyridones could also be obtained by the condensation of bis‐cyanoacetamides with substituted arylidenemalononitriles in the presence of piperidine, chitosan, or