## Abstract magnified image The 7‐aryl‐4,7‐dihydro[1,2,4]triazolo[1,5‐__a__]pyrimidines **1a**, **1b**, **1c** can undergo addition of hydrazine to the enamine double bond leading to hydrazine derivatives of tetrahydrotriazolopyrimidines **2a**, **2b**, **2c**; the process is usually accompanied by
Metal complexes of [1,2,4]triazolo-[1,5-a]pyrimidine derivatives
✍ Scribed by Juan M. Salas; M. Angustias Romero; M. Purificación Sánchez; Miguel Quirós
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 361 KB
- Volume
- 193-195
- Category
- Article
- ISSN
- 0010-8545
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✦ Synopsis
This article covers all the research work published until September 1998 about the coordination chemistry of 1,2,4-triazolo-[1,5-a]pyrimidine derivatives. The revision is mainly focused in the structural features of the compounds, obtained from single crystal X-ray diffraction. The references are classified according to the present metal atoms. These kind of ligands display a broad versatility when binding metal ions, monodentate binding through www.elsevier.com/locate/ccr
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## Abstract The 7‐chloro‐3‐(2‐chlorobenzyl)‐ and 7‐chloro‐3‐(2‐fluorobenzyl)‐1,2,3‐triazolo[4,5‐__d__]pyrimidines (**1** and **4**), by nucleophilic replacement with some hydrazides, gave the corresponding 7‐hydrazidoderivatives (**2a‐e** and **5a‐e**). These, by heating in Dowtherm, underwent an i
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