Synthesis of (R) and (S)-aminocarnitine, (R) and (S)-4-phosphonium-3-amino-butanoate, (R) and (S) 3,4-diaminobutanoic acid, and their derivatives starting from D- and L-aspartic acid
A process is described for the preparation of R or S aminocarnitine, R or S phosphonium aminocarnitine and R and S 3,4 diaminobutanoic acid, and their derivatives with the following formula:
1
where Y is as described in the attached description, starting from aspartic acid with the same configuration as the desired compounds. This process is advantageous from the industrial point of view in terms of the type of reactants used, the reduced volumes of solvents and the possibility of avoiding purification of the intermediate products.
Process for producing (-) N-acetylaminocarnitine and (+) N-acetylaminocarnitine
申请人:SIGMA TAU
Industrie Farmaceutiche Riunite S.p.A.
公开号:EP0287523A2
公开(公告)日:1988-10-19
A process for producing (-) N-acetylaminocarnitine and (+) N-acetylaminocarnitine by resolution of a racemic mixture of(±) N-acetylaminocarnitine where the racemate is reacted with an optically active acid (e.g. (+) dibenzoyl (D(-) tartaric acid) and the diastereoisomeric salts thus obtained are separated by fractional crystallization.