ChemInform Abstract: Synthesis of Pyrazolo[4,3-e][1,2,4]triazolo[4,3-c]pyrimidines (V)
β Scribed by Abolghasem Davoodnia; Rahele Zhiani; Niloofar Tavakoli-Hoseini
- Publisher
- John Wiley and Sons
- Year
- 2009
- Weight
- 27 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0931-7597
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β¦ Synopsis
Abstract
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## Abstract For Abstract see ChemInform Abstract in Full Text.
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
## Abstract Reaction of thiosemicarbazides (III) with MeβI/AcONa gives regioselectively the linearly fused products (IV) while reaction of compounds (III) with DCC gives predominantly the angularly fused products (VI).