107796-99-6Relevant articles and documents
PROCESS FOR PRODUCTION OF OPTICALLY ACTIVE 3-AMINO-2 -HYDROXYPROPIONIC CYCLOPROPYLAMIDE DERIVATIVES AND SALTS THEREOF
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Page/Page column 26-27, (2009/04/23)
An objective of the present application is to provide an industrially practicable method for producing an optically-active 3-amino-2-hydroxypropionic cyclopropylamide derivative or salt thereof from an inexpensive easily-available starting material. The derivative or salt thereof is useful as an intermediate for a medicine. It is also intended by the present application to provide a useful intermediate of the derivative. The objective is attained by the following method. First, an easily-available 2-halo-3-oxopropionic acid derivative is asymmetrically reduced, and then epoxidated to produce an optically-active epoxycarboxylic acid derivative. Next, the derivative is converted into an optically-active epoxyamide derivative by reaction with cyclopropylamine, and then reacted with a nitrile to obtain an optically-active oxazolinamide derivative. Subsequently, selective acid solvolysis of the oxazoline skeleton gives the optically-active 3-amino-2-hydroxypropionic cyclopropylamide derivative or salt thereof.
A CONVENIENT SYNTHESIS OF OPTICALLY ACTIVE 1H-AZIRIDINE-2-CARBOXYLIC ACIDS (ESTERS).
Legters, J.,Thijs, L.,Zwanenburg, B.
, p. 4881 - 4884 (2007/10/02)
Optically active glycidic esters, prepared from allylic alcohols employing the Sharpless epoxidation, were treated with sodium azide.In a subsequent reaction with PPh3 the azido alcohols thus obtained were converted into aziridine-2-carboxylic esters of high optical purity in good yields.
Enantioselective Diastereospecific Synthesis of anti-α-Alkyl-β-hydroxy Esters through Cuprate Opening of Glycidic Esters
Mulzer, Johann,Lammer, Ortrud
, p. 2178 - 2190 (2007/10/02)
A diastereospecific chain elongation of the aldehydes 1 to anti-αalkyl-β-hydroxy esters 2 via the intermediates 4 - 7 is described.By means of the Sharpless epoxidation, 2 may be obtained with >90percent ee in either enantiomer.