Method for producing an optically active...

Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing oxygen-containing organic compound

Reexamination Certificate

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Reexamination Certificate

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07816107

ABSTRACT:
A process for preparing optically active 2-methylalkan-1-ol of the general formula (III) comprising the following steps:(i) carbonyl-selective reduction of 2-methylalk-2-en-1-al of the general formula (I) to 2-methylalk-2-en-1-ol of the general formula (II),(ii) enantioselective hydrogenation of 2-methylalk-2-en-1-ol to the general formula (iii),(iii) increasing the optical yield of the optically active 2-methylalkan-1-ol (III) obtained in step (ii) by a lipase-catalyzed acylation reaction,where the radical R means C1-C10-alkyl.

REFERENCES:
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patent: 0529698 (1993-03-01), None
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Högberg, H. E., “Approaches to 2-methyl-1-alkanols of high enantiomeric purities via enzyme mediated reactions,” Microbial Reagents in Organic Synthesis, 1992, vol. 381, pp. 399-410.
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Oppolzer, W. et al., “25. Camphorsulfonamide-shielded, asymmetric 1,4-additions and enolate alkylations; synthesis of a Southern Corn Rootworm pheromone,” Helvetica Chimica Acta, 1985, vol. 68, pp. 212-215.
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