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Benzaldehyde disalicyl acetal hydrolysis

Hydrolysis of benzaldehyde disalicyl acetal is characterized by a bell-shaped pH-rate const2int profile (Anderson and Fife, 1971a,... [Pg.22]

Figure 6. Plot of t obsd vs. pH for hydrolysis of benzaldehyde disalicyl acetal in 50% dioxane—HjO at 25°. Figure 6. Plot of t obsd vs. pH for hydrolysis of benzaldehyde disalicyl acetal in 50% dioxane—HjO at 25°.
Bell-shaped pH-rate profiles are obtained in lysozyme reactions (Rupley et al., 1967) which are consistent with direct involvement of two groups in the reaction. However, bell-shaped pH-rate constant profiles are also observed in the hydrolysis of benzaldehyde disalicyl acetals, and in the case of p-nitrobenzaldehyde o-carboxyphenyl p-carboxyphenyl acetal only one carboxyl group can participate. One should then take care in postulating bifunctional catalysis in the lysozyme reaction, since the observed kinetics and the rate enhancements are explicable in terms of a chemically simpler mechanism (general acid catalysis by glutamic acid-35 along with release of ground state... [Pg.114]

See other pages where Benzaldehyde disalicyl acetal hydrolysis is mentioned: [Pg.348]    [Pg.114]    [Pg.348]   
See also in sourсe #XX -- [ Pg.348 ]



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