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Industrial Biotransformations

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Carbonyl reductase<br />

Escherichia coli<br />

1 = ethyl 4-chloro-3-oxobutanoate<br />

2 = ethyl (S)-4-chloro-3-hydroxybutanoate<br />

Fig. 1.1.1.1 – 1<br />

1) Reaction conditions<br />

[1]: 1.82 M, 299.6 g · L –1 [164.59 g · mol –1 ]<br />

[2]: 1.22 M glucose<br />

pH: 6.5<br />

T: 30 °C<br />

medium: two-phase-system<br />

reaction type: asymmetric reduction<br />

catalyst: whole cells<br />

enzyme: carbonyl reductase<br />

enzyme: glucose dehydrogenase<br />

strain: Escherichia coli<br />

2) Remarks<br />

Cl<br />

● n-Butyl acetate is used as the organic phase.<br />

3) Flow scheme<br />

Not published.<br />

O<br />

4) Process parameters<br />

yield: 85 %<br />

ee: 99 %<br />

company: Kaneka Corporation, Japan<br />

5) Product application<br />

O<br />

O<br />

E 1<br />

1 2<br />

EC 1.1.1.1<br />

Kaneka Corporation<br />

● (S)-4-Chloro-3-hydroxy-butanoate is an important starting material for hydroxymethylglutaryl-<br />

CoA reductase inhibitors.<br />

172<br />

Metabolites<br />

NADPH, H + NADP +<br />

E 2<br />

Cl<br />

OH<br />

Glucose<br />

O<br />

O

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