| 摘要 |
The invention relates to an enzymatic process for the production of an intermediate, bicyclic-heteroaryl-2-carboxylic acid, of the formula (I) wherein X and Y are defined in the specification and which are useful in the preparation of beta-lactamase inhibitors, by selective enzymatic hydrolysis of a mixture of positional hydrolyzable esters of the formula (II) and (III) where X, Y and R are defined in the specification.
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