Process for preparing 2-chloropropionate esters optical isomers

C - Chemistry – Metallurgy – 07 – C

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260/492, 260/387

C07C 67/327 (2006.01) C07C 67/307 (2006.01) C07C 69/63 (2006.01) C07D 213/63 (2006.01) C07D 307/58 (2006.01) C07D 333/32 (2006.01)

Patent

CA 2017924

PRECIS DE LA DIVULGATION: L'invention concerne un procédé de préparation d'esters d'acide 2-chloro- propionique optiquement actifs de formule(1) Image (I) COOR1 étant un groupe hydrolysable,à partir d'un lactate optiquement actif de formule Image (II) avec inversion de configuration par mise en contact du lactate (II) avec SOCl2 puis décomposition du chlorosulfite formé, ledit procédé étant caractérisé en ce que au moins l'étape de décomposition est effectuée en précence d'éther. Le procédé selon l'invention permet notamment l'inversion de configuration sans employer de base.

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