Method of producing optically active tert-leucinol and its use

US5723667A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Karlheinz Drauz · Alzenau, DE
• Wilfried Jahn · Gelnhausen, DE
• Michael Schwarm · Alzenau, DE

Key dates

• Filing date: Feb 21, 1996
• Grant date: Mar 3, 1998
• Expiry date: Feb 21, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C213/10
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method of producing optically active tert-leucinol (formula I) of high enantiomeric purity ##STR1## by converting racemic (RS)-tert-leucinol into a diastereomeric salt pair by reaction with an optically active acid, removing the salt pair from solution by fractionated crystallization and separating therefrom the optically active acid to release the optically active tert-leucinol from the salt. The optically active acid used is an N-acylated tert-leucine of general formula VIII: ##STR2## in which R can be hydrogen or an alkyl-, arylalkyl- or aryl group with up to 20 C atoms and * signifies a chirality center.