6533b7dafe1ef96bd126f4c2

RESEARCH PRODUCT

Strukturaufklärung der bei der Addition von 2-Cyano-2-propylradikalen an p-Tolyl- und 4-Cyclohexylphenyl-methacrylat entstehenden Produkte mittels 1H NMR- und Massenspektren

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description

The chromatographically pure products, gained on the suppression of polymerisation of p-tolyl or 4-cyclohexylphenyl methacrylates (1, 2) by a great excess of 2-cyano-2-propyl radicals, could be isolated in a total yield of 95 to 100%. The structure of these products was established by 1H NMR and mass spectroscopy. There are p-tolyl or 4-cyclohexylphenyl 4-cyano-2-(2-cyano-2-propyl)-2,4-dimethylvalerate (1a, 2a), p-tolyl or 4-cyclohexylphenyl 2-(2-cyano-2-methylpropyl)acrylate (1b, 2b), p-tolyl or 4-cyclohexylphenyl 4-cyano-4-methyl-2-(2-cyano-2-methylpropyl)valerate (1c, 2c), p-tolyl or 4-cyclohexylphenyl 4-cyano-2,4-dimethylvalerate (1d, 2d), and p-tolyl or 4-cyclohexylphenyl 4-cyano-2,4-dimethyl-2-pentenoate (1e, 2e (2f)). It is possible to give a scheme of reactions on the suppression of the radical polymerisation.