Abstract Chemoselective hydrolysis of heterocyclic nitriles can be achieved by an easy to use immobilized biocatalyst prepared from Rhodococcus sp. Pyrimidine-2-carbonitrile (2a) and 3-chloropyridazine-4-carbonitrile (4a) were converted into the corresponding amides while from 2-ethoxycarbonyl-4-pyridinecarbonitrile (1a), 6-methylpyridazine-3-carbonitrile (3a), 3-chloropyridazine-4-carbonitrile (4a), 3-ethoxycarbonyl-4, 5-dihydroisoxazole-5- ...
