N-(2-Vinyloxyethyl)-4,5-dihydro-1 H-pyrazoles.

The article studies the use of vinyl ethers having a dihydropyrazole ring as biologically active substances and monomers for the synthesis of anion exchangers. According to the authors, the reaction of 4,5-dihydropyrazoles with 2-chloroethanol and potassium hydroxide yielded 1-(2-hydroxyethyl)-4,5-dihydropyrazoles. 1-(2-vinyloxyethyl)-4,5-dihydro-1H-pyrazoles were isolated, purified and subjected to vinylation with acetylene in dimethyl sulphoxide in the presence of potassium hydroxide.