09.12.2012 Views

Industrial Biotransformations

Industrial Biotransformations

Industrial Biotransformations

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Lipase<br />

Serratia marescens<br />

4) Process parameters<br />

yield: 40–45 %<br />

ee: 99.9 %<br />

reactor type: batch, hollow fibre reactor (Sepracor Inc. Massachusetts, USA)<br />

capacity: 40 kg (–)-MPGM · m –2 ·a –1<br />

down stream processing: crystallization<br />

enzyme activity: 1.6 · 105 U·m –2<br />

enzyme stability:<br />

start-up date:<br />

t½ = 127 h<br />

1993<br />

production site: Tanabe Seiyaku Co., Japan<br />

company: Tanabe Seiyaku Co. Ltd., Japan<br />

5) Product application<br />

● The product is an intermediate in the synthesis of diltiazem.<br />

EC 3.1.1.3<br />

● Diltiazem hydrochloride is a coronary vasodilator and a calcium channel blocker (for anti-anginal<br />

and anti-hypertensive actions) and is produced worldwide in excess of 100 t · a –1 .<br />

● In comparison to the chemical route only 5 steps (instead of 9 steps) are necessary. The kinetic<br />

resolution is carried out in an earlier step during the synthesis resulting in reduction of waste:<br />

308

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

Saved successfully!

Ooh no, something went wrong!