C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 255/43 (2006.01) C07C 253/34 (2006.01)
Patent
CA 2210337
A process is disclosed for separating racemates of phenyl acetonitriles having the formula (I), in which R1, R2, R3 and n have the meaning given in the description. The process consists in dissolving the racemates (I) in a polar solvent, adding thereto 0.5 to 1.0 mole of optically active camphosulphonic acid per mole of compound (I), heating the mixture up to 40 to 100 °C, letting it cool down and extracting the optically active phenyl acetonitrile (I) from the thus obtained salt.
Un procédé permet de séparer les racémates d'acétonitriles de phényle ayant la formule (I), dans laquelle R<1>, R<2>, R<3> et n ont la notation donnée dans la description. Selon ce procédé, on dissout les racémates (I) dans un solvant polaire, on y ajoute 0,5 à 1,0 mole d'acide camphosulfonique optiquement actif par mole de composé (I), on chauffe le mélange jusqu'à une température comprise entre 40 et 100 DEG C, on le laisse refroidir et on extrait l'acétonitrile de phényle (I) optiquement actif du sel ainsi obtenu.
Karl Ulrich
Seitz Werner
Abbott Gmbh & Co. Kg
Basf Aktiengesellschaft
Robic
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