Photosynthetic Organism as a Biocatalyst Photobiocatalyst

TABLE 11.1 Reactions of Exogenous Substrates by Various Photobiocatalysts  

Cyanidiutn caldarlum) reduced aromatic ketones. Plant cell cultures (Nicotiana tabacum var. Samsun NN cells) reduced t-butyl acetoacetate to the corresponding (S)-alcohol with high optical yield. Radish (Raphanus sativus L.) sprout reduced a, a, a-trifluoro-acetophenone and Arabidopsis seedlings sprout reduced f-butyl acetoacetate to the corresponding chiral alcohol in eantiomeric excess. 

The light wavelength is associated with the efficiency of photosynthesis and can also have an impact on the photobiocataiysis. Asymmetric reduction of 2, 3, 4,  

Reduction of ketones by photobiocatalysts with the aid of light energy. 

On the other hand, the antipode, (E)-alcohol was obtained in 83% yield with 82% ee when glucose was added to the reaction in the dark with natural atmospheric CO concentrations (0.04%). This suggests that the enz3miatic system giving the (R)-alcohol is different from tiie reduction system that affords the (S)-alcohol, and the latter system is directly associated with photosynthesis [18]. 

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