Abstract
Whole-cell enzymatic hydrolysis was shown to be the choice in the preparation of ( S)-3-(thiophen-2-ylthio)butanoic acid. While all chemical methods of hydrolysis failed, 12 bacterial strains expressing nitrile hydratase and amidase activities have been identified to hydrolyze ( S)-3-(thiophen-2-ylthio)butanenitrile 1 directly into the corresponding acid. The substrate was also shown to be an efficient inducer of the enzymatic activity. However, it inhibited microbial growth. Acid 3 was prepared on a gram scale with the recombinant Rhodococcus erythropolis, formerly Brevibacterium sp. pYG811b as shown by sequencing of its 16S rRNA.
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