Abstract
It is established that the reason for the catalytic activity of o-aminophenols in the cyclotrimerization of isocyanates is the presence in the catalyst molecule of intramolecular hydrogen bonds O - H…N. The activation of the phenyl hydroxyl group due to this results in consumption of the catalyst in the formation of the corresponding urethane, which is reflected in the kinetics in the form of “autoinhibition” of cyclotrimerzation.
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