Hydrolysis of Phenyl Telomeric Ester Substrates Catalyzed by Hydroxamic Acidst

Abstract

The hydrolyses of phenyl esters catalyzed by telomer-type hydroxamic acids (THA) with various polymerization degree (n) were investigated by comparing them with those of these esters catalyzed by monomer-type hydroxamic acids (Cm) as an enzyme model concerning with a catalytic behavior.
C¹¹11₂₃CH (OH) - (CH₂-CH)_n-x-_z- (CH₂-CH) z-H
THA (n=10.3, 95.8, 431)
COONa CONHONa
H- (CH₂) m_₁-CONHOH Cm (m=6, 8, 10)
Among them, THA-I (n=10.3), which is water-soluble macromolecule and monomeric surfactant, was the most active catalyst for the ester hydrolysis in the presence of hexadecyltrimethylammonium bromide (CTAB).