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Industrial Biotransformations

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Alcohol dehydrogenase<br />

Neurospora crassa<br />

2) Remarks<br />

EC 1.1.1.1<br />

● In comparison to the biotransformation the inversion of the cis alcohol in the chemical synthesis<br />

of Trusopt TM (see product application) is not quantitative:<br />

HOOC<br />

OH<br />

S<br />

OH<br />

S<br />

S<br />

O O<br />

O<br />

OMe<br />

1 = (R)-3-hydroxy-methyl butyrate<br />

2 = ketosulfide<br />

3 = isomer of sulfide alcohol<br />

4 = (4S)-alcohol<br />

5 = Trusopt<br />

Fig. 1.1.1.1 – 2<br />

154<br />

1<br />

S<br />

NHCOCH3<br />

S<br />

S<br />

pyridine/<br />

tosyl chloride<br />

SO2Cl<br />

OTs<br />

O<br />

S<br />

OH<br />

S<br />

O O<br />

O<br />

LiS S<br />

CH3O2C OMe HCONH2<br />

S<br />

S<br />

NHCOCH3<br />

S<br />

S<br />

OH<br />

S<br />

O O<br />

NH3, THF<br />

SO2NH2 BH 3·DMS,<br />

THF<br />

S S<br />

O O<br />

S<br />

S<br />

S<br />

NHCOCH 3<br />

NHCH2CH3<br />

S<br />

O O<br />

conc. HCl<br />

TFAA, toluene LiAlH4 H 2SO 4, 0°C<br />

2<br />

H2O 2, NaWO 4 CH 3CN, H 2SO 4 HSO3Cl, SOCl 2<br />

4 (trans)-3<br />

(cis)-3<br />

5<br />

S<br />

SO 2NH 2

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