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Industrial Biotransformations

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Lipase<br />

Pseudomonas fluorescens<br />

4) Process parameters<br />

yield: 22 %<br />

ee: > 92 % (after recrystallization >99 %)<br />

reactor type: batch<br />

capacity: multi-kg<br />

residence time: 75 h<br />

down stream processing: extraction, crystallization<br />

production site: Celltech Group plc, U.K.<br />

company: Celltech Group plc, U.K.<br />

5) Product application<br />

● The product can be used as intermediate for the anti-HIV agent carbovir:<br />

O<br />

HO H<br />

O<br />

H<br />

(-)-1<br />

1 = hydroxylactone<br />

2 = carbovir<br />

Fig. 3.1.1.3 – 2<br />

EC 3.1.1.3<br />

● As (–)-hydroxylactone it can be used as intermediate for the synthesis of hypocholesteremic<br />

reagents and the antifungal agent brefeldin A:<br />

292<br />

1) LiAlH 4<br />

2) NaIO4<br />

3) NaBH4<br />

4) Ph 3CCl<br />

Ph3CO<br />

HO<br />

H<br />

H<br />

1) Ac2O<br />

2) 2-amino-6-chloropurine,<br />

Pd(PPh3)4<br />

H2N<br />

H2N<br />

N<br />

N<br />

Cl<br />

N<br />

N<br />

N<br />

OCPh3<br />

1) H3O +<br />

2) NaOH, H2O, reflux<br />

OH<br />

N<br />

2<br />

N<br />

N<br />

OH

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