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Industrial Biotransformations

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Pyruvate decarboxylase<br />

Saccharomyces cerevisiae<br />

molasses<br />

1) Reaction conditions<br />

[1]: 0.022 M, 3.3 g · L –1 [150.17 g · mol –1 ]<br />

medium: aqueous<br />

reaction type: carboligation<br />

catalyst: whole cells<br />

enzyme: 2-oxo-acid carboxy-lyase (α-ketoacid carboxylase, pyruvate decarboxylase)<br />

strain: Saccharomyces cerevisiae<br />

CAS (enzyme): [9001-04-01]<br />

2) Remarks<br />

● Phenylacetylcarbinol production from benzaldehyde by yeast is also operated on a large scale<br />

by Knoll (BASF, Germany) and Malladi Drugs (India).<br />

● Phenylacetylcarbinol is chemically converted in a two-step process to d-pseudoephedrine:<br />

3) Flow scheme<br />

Not published.<br />

O<br />

O H<br />

HO<br />

yeast E<br />

1<br />

+<br />

2<br />

O<br />

(1R)-3<br />

EC 4.1.1.1<br />

1 = acetaldehyde<br />

2 = benzaldehyde<br />

3 = phenylacetylcarbinol = PAC Krebs Biochemicals & Industries Ltd.<br />

Fig. 4.1.1.1 – 1<br />

Fig. 4.1.1.1 – 2<br />

O<br />

HO HO<br />

+ CH3NH2<br />

+ H2 / Pt<br />

(1R)-phenylacetylcarbinol<br />

HN<br />

+ Ac2O<br />

(1R, 2S)-ephedrine (1R, 2R)-pseudoephedrine<br />

(isoephedrine, (+)-threo-2methylamino-1-phenyl-1-propanyl)<br />

<strong>Industrial</strong> <strong>Biotransformations</strong>. Andreas Liese, Karsten Seelbach, Christian Wandrey (Eds.)<br />

Copyright © 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim<br />

ISBN: 3-527-31001-0<br />

HO<br />

HN<br />

447

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