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Synthesis of new monomers and polymers. II. 3-methyl-5-isopropenylpyrazoles and derivatives

✍ Scribed by Dufonteny, L. ;Mifuna, E. ;Neirynck, G. ;Teyssié, Ph.

Book ID
104532063
Publisher
John Wiley and Sons
Year
1962
Weight
566 KB
Volume
56
Category
Article
ISSN
0022-3832

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✦ Synopsis

Abstract

The synthesis of 3‐methyl‐5‐isopropenylpyrazole and 1‐phenyl‐3‐methyl‐5‐isopropenylpyrazole is described, as well as the isolation of an addition compound with vinyl isocyanate, namely the N‐vinyl‐1‐(3‐methyl‐5‐isopropenylpyrazolyl)carboxamide. The 3‐methyl‐5‐isopropenylpyrazole only is able to homopolymerize, giving a characteristic polyelectrolyte, but both pyrazoles copolymerize readily with acrylic acid to yield polyampholytes. The addition compound, whose structure is proved by several methods, polymerizes readily; the soluble product obtained may undergo a grafting reaction with other monomers, but the polymer obtained is highly crosslinked.

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