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Industrial Biotransformations

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Lipase<br />

Candida antarctica<br />

3) Flow scheme<br />

OH<br />

4) Process parameters<br />

conversion: 55 %<br />

yield: 36 %<br />

ee: >98 %<br />

reactor type: batch<br />

residence time: 6–8 h<br />

down stream processing: filtration, extraction (water), extraction (ethylacetate), evaporation<br />

enzyme supplier: Novo Nordisk<br />

company: GlaxoSmithKline plc, U.K.<br />

5) Product application<br />

● The product is used as building block for Trinems, a new class of totally synthetic b-lactam<br />

antibiotics containing a tricyclic skeleton (see Scheme 2). Both compounds are in full clinical<br />

development.<br />

6) Literature<br />

OMe<br />

Fig. 3.1.1.3 – 3<br />

OAc<br />

OMe<br />

EC 3.1.1.3<br />

● Stead, P., Marley, H., Mahmoudian, M., Webb, G., Noble, D., Ip, Y.T., Piga, E., Rossi, T.,<br />

Roberts, S., Dawson, M.J. (1996) Efficient procedures for the large-scale preparation of<br />

(1S,2S)-trans-2-methoxycyclohexanol, a key chiral intermediate in the synthesis of tricyclic<br />

b-lactam antibiotics, Tetrahedron: Asymmetry 7 (8), 2247–2250<br />

OH<br />

OMe<br />

303

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