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Lanthanide ion-induced hydrolyses of alkyl esters and amides of α-amino acids

✍ Scribed by Tohru Takarada; Rei Takahashi; Morio Yashiro; Makoto Komiyama

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
124 KB
Volume
11
Category
Article
ISSN
0894-3230

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✦ Synopsis

Lanthanide ion-induced hydrolyses of methyl esters, ethyl esters, and amides of a-amino acids were systematically studied. In the hydrolysis of the alkyl esters, all the lanthanide ions are effective and the catalytic activities decrease in the order Ce(III), Nd(III) b Sm(III) b Eu(III) b Gd(III), Ce(IV) b Pr(III) b Dy(III), Tb(III), Er(III), Ho(III), Tm(III) b La(III), Lu(III), Yb(III).

For the hydrolysis of the amides, however, the Ce(IV) ion is overwhelmingly more active than other lanthanide(III) and non-lanthanide ions. The results are interpreted in terms of the difference in the rate-limiting step for these two reactions.

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