09.12.2012 Views

Industrial Biotransformations

Industrial Biotransformations

Industrial Biotransformations

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Halohydrin dehalogenase<br />

1 = ethyl-(S)-4-chloro-3-hydroxybutyrate<br />

2 = ethyl-(R)-4-cyano-3-hydroxybutyrate<br />

Fig. 3.8.X.X – 1<br />

1) Reaction conditions<br />

[1]: >0.577 M, >80 g · L –1 [138.55 g · mol –1 ]<br />

pH: 7.3<br />

T: 40 °C<br />

medium: aqueous<br />

reaction type: cyanation<br />

catalyst: soluble recombinant enzymes<br />

enzyme: mutant halohydrin dehalogenase<br />

enzyme: mutant glucose dehydrogenase<br />

2) Remarks<br />

Fig. 3.8.X.X – 2<br />

Cl<br />

OH<br />

O<br />

OEt<br />

1 2<br />

NH<br />

O<br />

E<br />

NaCN<br />

H2SO4 - NaCl<br />

N<br />

OH OH<br />

EC 3.8.X.X<br />

Codexis Inc.<br />

● First step of the process is the enantioselective reduction of ethyl-4-chloro-3-ketobutyrate ( see<br />

page 191, EC 1.1.X.X)<br />

F<br />

OH<br />

NC<br />

OH<br />

O–) 2Ca++<br />

O<br />

OEt<br />

NC<br />

OH<br />

445

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!