[EN] PROCESS OF PREPARATION OF OPTICALLY ACTIVE ALPHA AMINOACETALS<br/>[FR] PRÉPARATION D'ALPHA AMINOCÉTALS OPTIQUEMENT ACTIFS
申请人:CLARIANT SPECIALTY FINE CHEM
公开号:WO2009106386A1
公开(公告)日:2009-09-03
The invention relates to a process for preparing optically active α-aminoacetals by resolution of a racemic mixture or of a mixture of enantiomers via the formation of diastereoisomeric salts, and also novel intermediates in the form of diastereoisomeric salts.
[EN] PROCESS FOR PREPARING ALPHA AMINOACETALS IN RECEMIC FORM<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION D'ALPHA-AMINOACÉTALS SOUS FORME RACÉMIQUE
申请人:CLARIANT SPECIALTY FINE CHEM
公开号:WO2010031544A1
公开(公告)日:2010-03-25
The invention relates to a process for preparing an α-aminoacetal, or addition salts thereof, of formula (I) in recemic form comprising the steps consisting in: reacting a glyoxal monoacetal of formula (II) with an arylalkylamine of formula (III) in such a way as to obtain an imine of formula (IV); adding a Grignard reagent of formula R3-Mg-HaI to said imine of formula (IV) so as to obtain an amine of formula (V), and - deprotecting the amine of formula (V) in such a way as to obtain the compound of formula (I) in racemic form, and, where appropriate, adding an inorganic or organic acid in order to obtain an addition salt of the α-aminoacetal of formula (I).