A series of novel 3-substituted 2-oxobutanoic acids were prepared and incub
ated with leucine dehydrogenase giving in one case both a kinetic resolutio
n at C-3 and reductive amination of the ketone. This is the first example o
f an amino acid dehydrogenase catalysed kinetic resolution and reductive am
ination. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.