Process for preparing 2-chloropropionic acid esters

C - Chemistry – Metallurgy – 07 – C

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260/387, 260/492

C07C 67/307 (2006.01) C07C 69/62 (2006.01) C07C 69/63 (2006.01)

Patent

CA 2008403

PR?CIS DE LA DIVULGATION L'invention concerne un procédé de préparation d'ester d'acide chlorocarboxylique optiquement actif à partir de l'ester d'acide .alpha.-hydroxy carboxylique correspondant. Ce procédé qui a l'avantage d'offrir d'excellents rendements tout en conservant une excellente activité optique, est caractérisé en ce que l'on met en contact l'ester d'acide .alpha.-hydroxy carboxylique avec du phosgène et un composé choisi parmi les amides aliphatiques, les lactames aliphatiques et les urées aliphatiques. Ce procédé est notamment utilisable à la fabrication d'intermédiaires utiles dans l'industrie agrochimique, tels que des esters de 2-chloropropionate.

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