## Abstract Flexible ligands 1,3‐bis(pyrazol‐1‐yl)propanes, bis[2‐(pyrazol‐1‐yl)ethyl] ethers, and bis[2‐(3,5‐dimethylpyrazol‐1‐yl)ethyl]amine were prepared by a facile procedure involving the reaction of pyrazoles with 1,3‐dibromopropane, bis(2‐chloroethyl) ether or bis(2‐chloroethyl)amine hydroch
Synthesis of Bis-Azolylmethanes Derived from Benzotriazole and Pyrazole in a Superbasic Medium.
✍ Scribed by A. S. Potapov; A. I. Khlebnikov
- Publisher
- John Wiley and Sons
- Year
- 2004
- Weight
- 85 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0931-7597
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## Abstract Reaction of pyrazole and 1,1,2,2‐tetrabromoethane in a superbasic medium dimethylsulfoxide‐potassium hydroxide was investigated, and a number of pyrazolyl‐ and bromo‐substituted ethenes, which are the products of concurrent substitution and elimination reactions, were identified. Carryi
## Abstract A new approach to the synthesis of pyridazinone, ethoxypyridine, pyrazole and 7‐aminopyrazolo‐[1,5‐__a__]pyrimidine derivatives. The structure of the newly synthesized compounds was elucidated by elemental analyses, ir, ^1^H nmr spectra and in some cases by ^13^C nmr investigations.
Efficient and regioselective syntheses of l-phenyl-5-pyrazolones substituted with a phosphoranylidene group in the 3-position and of 3-alkoxycarbonyl-5-methoxy-l-phenyl pyrazoles ~e described. The key step is the formation of functionalized hydrazones by [2+2] cycloaddition reaction of phosphazenes