For biocatalytic production of pharmaceutically important chiral amines the ω-transaminase enzymes have proven useful. Engineering of these enzymes has to some extent been accomplished by rational design, but mostly by directed evolution. By use of a homology model a key
The three-component chiral derivatization protocols have been developed for (1)H, (13)C and (19)F NMR spectroscopic discrimination of chiral diacids by their coordination and self-assembly with optically active (R)-α-methylbenzylamine and 2-formylphenylboronic acid or 3-fluoro-2-formylmethylboronic acid. These protocols yield a mixture of
Bioscience, biotechnology, and biochemistry, 72(11), 3030-3033 (2008-11-11)
To produce (S)-alpha-methylbenzylamine (MBA) from acetophenone, recombinant Escherichia coli co-expressing omega-transaminase and acetolactate synthase was used as a whole-cell biocatalyst. The solvent-bridge reaction system increased the yield of the whole-cell reaction by 2.5-fold, and the inhibitory (S)-alpha-MBA produced in the
Magnetic resonance in chemistry : MRC, 47(5), 423-427 (2009-02-19)
Two types of chiral analytes, the urea and amide derivatives of alpha-phenylethylamine, were prepared. The effect of inter-molecular hydrogen-bonding interaction on self-discrimination of the enantiomers of analytes has been investigated using high-resolution (1)H NMR. It was found that the urea
Journal of separation science, 33(2), 143-154 (2009-12-31)
Free fatty acids were derivatized as amides (DFFA) by reaction with (R)-(+)-1-phenylethylamine, using a simple, fast and robust reaction scheme. A HPLC method with diode array and ESI MS detection was developed for the analysis of the derivatized substances. Six
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