4-Hydroxycoumarin in heterocyclic synthesis: Part III. Synthesis of some new pyrano[2,3-d]pyrimidine, 2-substituted[1,2,4]triazolo[1,5-c]pyrimidine and pyrimido[1,6-b][1,2,4]triazine derivatives
✍ Scribed by A.H Bedair; Nagwa A El-Hady; M.S.Abd El-Latif; A.H Fakery; A.M El-Agrody
- Book ID
- 114018857
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 122 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0014-827X
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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
Synthesis of New 2-Substituted-pyrazolo[4',3':5,6]pyrano[3,2e][1,2,4]triazolo [1,5-c]pyrimidine Derivatives. -Starting from pyrazole (III) the pyrimidine (V) is prepared which is further treated with different carboxylic acid derivatives to form novel pyrimidines of type (VI) and (VIII). Preparatio