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Industrial Biotransformations

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Carnitine dehydratase<br />

Escherichia coli<br />

AgOOC<br />

OH<br />

OH<br />

OH<br />

OH<br />

HOOC<br />

COOAg + N Cl<br />

COOH<br />

+<br />

O<br />

2 + 2<br />

(+)-L-1 (D,L)-2<br />

(+)-L-3<br />

1 = silver tartrate<br />

2 = (3-chloro-2-hydroxypropyl)-trimethylammonium salt<br />

3 = tartaric acid<br />

4 = epichlorohydrin<br />

5 = tartrate<br />

6 = (3-cyano-2-hydroxypropyl)-trimethylammonium salt<br />

7 = carnitine<br />

Fig. 4.2.1.89 – 3<br />

- 2 AgCl<br />

- OOC<br />

- OOC<br />

OH<br />

OH<br />

OH<br />

OH<br />

COO -<br />

COO -<br />

N + Cl- N +<br />

D,L-5<br />

L-5<br />

N +<br />

N +<br />

(R)-(-)-1<br />

OH<br />

OH<br />

OH<br />

Cl<br />

recrystallization<br />

33.2 % yield<br />

OH<br />

OH<br />

L-7<br />

Ca(CN) 2<br />

CN<br />

COO -<br />

Cl<br />

acidic alcoholysis<br />

2<br />

2<br />

(D,L)-4<br />

EC 4.2.1.89<br />

Cl<br />

+ 2 NMe3<br />

491

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