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Reactions of pyrimidinonethione derivatives: Synthesis of 2-hydrazinopyrimidin-4-one, pyrimido[1,2-a]-1,2,4-triazine, triazolo-[1,2-a]pyrimidine, 2-(1-pyrazolo)pyrimidine and 2-arylhydrazonopyrimidine derivatives

✍ Scribed by Fawzy A. Attaby; Sanaa M. Eldin; Eman A. Z. Hanafi

Publisher: Springer
Year: 1997
Tongue: English
Weight: 636 KB
Volume: 20
Category: Article
ISSN: 0253-6269
DOI: 10.1007/bf02975221

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Synthesis of some novel pyrazolo[1,5-a]p

Synthesis of some novel pyrazolo[1,5-a]pyrimidine, 1,2,4-triazolo[1,5-a]pyrimidine, pyrido[2,3-d]pyrimidine, pyrazolo[5,1-c]-1,2,4-triazine and 1,2,4-triazolo[5,1-c]-1,2,4-triazine derivatives incorporating a thiazolo[3,2-a]benzimidazole moiety

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## Abstract magnified image __E__‐3‐(__N,N__‐Dimethylamino)‐1‐(3‐methylthiazolo[3,2‐__a__]benzimidazol‐2‐yl)prop‐2‐en‐1‐one (**2**) was synthesized by the reaction of 1‐(3‐methylthiazolo[3,2‐__a__]benzimidazol‐2‐yl)ethanone (**1**) with dimethylformamide‐dimethylacetal. The reaction of **2** with

ChemInform Abstract: Synthesis of Some N

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## Abstract magnified image 4‐Acetyl‐5‐methyl‐1‐phenyl‐1__H__‐pyrazole reacts with dimethylformamide dimethylacetal (DMF‐DMA) to afford the corresponding (__E__)1‐(5‐methyl‐1‐phenyl‐1__H__‐pyrazol‐4‐yl)‐3‐(__N,N__‐dimethylamino)‐2‐propen‐1‐one. The latter product undergoes regioselective 1,3‐dipol

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## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

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