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Development of dynamic kinetic resolution on large scale for (±)-1-phenylethylamine

By Lisa K. Thal&#233 and Jan-E. B&#228

Abstract

<i>Candida antarctica</i> lipase B (CALB) and racemization catalyst <b>4</b> were combined in the dynamic kinetic resolution (DKR) of (&#177;)-1-phenylethylamine (<b>1</b>). Several reaction parameters have been investigated to modify the method for application on multigram scale. A comparison of isopropyl acetate and alkyl methoxyacetates as acyl donors was carried out. It was found that lower catalyst loadings could be used to obtain (<i>R</i>)-2-methoxy-<i>N</i>-(1-phenylethyl)acetamide (<b>3</b>) in good yield and high ee when alkyl methoxyacetates were used as acyl donors compared to when isopropyl acetate was used as the acyl donor. The catalyst loading could be decreased to 1.25 mol % Ru-catalyst <b>4</b> and 10 mg CALB per mmol <b>1</b> when alkyl methoxyacetates were used as the acyl donor

Topics: dynamic kinetic resolution, kinetic resolution, racemization, Shvo, <i>Candida antartica</i> lipase B, Organic chemistry, QD241-441, Chemistry, QD1-999, Science, Q, DOAJ:Organic Chemistry, DOAJ:Chemistry
Publisher: Beilstein-Institut
Year: 2010
DOI identifier: 10.3762/bjoc.6.97
OAI identifier: oai:doaj.org/article:3b65cf5ea3e1476bb9ced3c1d9fb9651
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