Method for preparing enantiomeric forms of amino...

Details Method for preparing enantiomeric forms of amino... Method for preparing enantiomeric forms of amino...

C - Chemistry, Metallurgy

07

C

C07C 229/42 (2006.01) C07C 227/14 (2006.01) C07C 227/32 (2006.01) C07C 229/12 (2006.01) C07K 7/06 (2006.01)

Patent

CA 2220403

A method for preparing an enantiomeric form of 2-amino-3-(4-alkylaminophenyl)propanoic acid of general formula (I), wherein Alk is a C1-2 alkyl radical in (S) or (R) form, and salts thereof, from (L)-phenylalanine and (D)-phenylalanine respectively, by nitration followed by conversion of the nitro radical of the resulting 4-nitro phenylalanine of general formula (II), wherein R is a hydrogen atom or a protective radical, into an alkylamino radical, optionally after having protected the amine function of the phenylalanine.

Procédé de préparation d'une forme énantiomère de l'acide amino-2(alkylamino-4 phényl)-3 propanoïque de formule générale (I), dans laquelle Alk représente un radical alcoyle contenant 1 à 2 atomes de carbone, sous forme (S) ou (R), ainsi que de ses sels, à partir respectivement de la (L)-phénylalanine ou de la (D)-phénylalanine, par nitration, puis transformation du radical nitro de la nitro-4 phénylalanine obtenue, de formule générale (II), dans laquelle R est un atome d'hydrogène ou un radical protecteur, en un radical alcoylamino, après protection le cas échéant de la fonction amine de la phénylalanine.

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