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Fungal Cells Permeabilization as a Convenient Tool of Bioreduction Enantioselectivity Control

Brzezińska-Rodak M., Żymańczyk-Duda E., Klimek-Ochab M., Lejczak B.

Polish Journal of Chemistry

2009

Vol. 83, nr 12

2113-2118

The application of nonionic detergents: Triton X100 and Tween 80, as permeabilizing agents was an effective tool allowing to control the asymmetric hydrogen transfer in the biocatalyzed, enantioselective reduction of acetophenone to the desired optical isomer of 1-phenylethanol. Depending on the permeabilization procedure, the application of Geotrichum candidum, after the Triton X100 was applied, resulted in the formation of the R-enantiomer (79 percent of chemical yield and 72 percent of e.e), whereas bioreduction following the use of Tween 80 led to the S-form of 1-phenylethanol (51 percent of yield and 93 percent of e.e).

Biocatalytical Synthesis and Further Determination of the Absolute Configuration of Diethyl of (R)-2-Hydroxybutylphosphonate

Brzezińska-Rodak M., Żymańczyk-Duda E., Klimek-Ochab M., Lejczak B.

Polish Journal of Chemistry

2007

Vol. 81, nr 11

1911-1916

Biotransformations of diethyl ester of 2-oxobutylphosphonate catalyzed by different kinds of yeasts: Rhodotorula gracilis and baker yeasts al lowed to obtain optically pure product – hydroxyphosphonate of R – absolute configuration. Chemical yield of the reaction was depended on the microbial cells pretreat ment and on the chemical additives, which are known to modify dehydrogenase activity [1].