Process for production of mono-substituted alkylated compound using aldimine or derivative thereof
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United States of America Patent
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May 13, 2014
Grant Date -
Feb 26, 2009
app pub date -
Jul 28, 2006
filing date -
Jul 29, 2005
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Abstract
The present invention provides a method for producing asymmetrical mono-substituted alkylated compounds of α-amino acids that are represented by a specific formula, using an aldimine-type Schiff base. In the method of the present invention, the process of alkylating an aldimine-type Schiff base in a medium in the presence of an optically-active quaternary ammonium salt phase-transfer catalyst and an inorganic base is initiated, and subsequently the reaction is quenched at a time earlier than a time for completion of the stoichiometric reaction of the alkylation reaction, so that a mono-substituted alkylated product with high optical purity can be obtained.
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