Two methods are described for the preparation of enantiomerically pure
(+)-trans-isochorismic acid, an important metabolite of the postchori
smate pathway. Both methods can be employed to prepare isotopically la
beled isochorismic acid. One of the two methods is suitable to prepare
bulk quantities of isochorismic acid using a recombinant strain of Kl
ebsiella pneumoniae 62-1. (C) 1995 John Wiley and Sons, Inc.