Process for the preparation of 4,4-difluoro-3-oxobutanoic...

Details Process for the preparation of 4,4-difluoro-3-oxobutanoic... Process for the preparation of 4,4-difluoro-3-oxobutanoic...

C - Chemistry, Metallurgy

07

C

C07C 67/343 (2006.01) C07C 69/716 (2006.01)

Patent

CA 2572896

The present invention relates to a process for the preparation of a compound of the formula (I), wherein R is C1-12 alkyl, by the contact of a compound of the general formula (II) , wherein R1 and R2 are each, independently, C1-12 alkyl; or R1 and R2 join together with the nitrogen atom to which they are attached to form an alicyclic amine ring containing 4 to 7 carbon atoms or a morpholine ring, with an acetic acid ester of the general formula (III) CH3COOR, wherein R is as defined under formula (I), in the presence of a base.

L'invention concerne un procédé de préparation d'un composé de formule (I), dans laquelle R représente alkyle C1-12, par mise en contact avec un composé de formule générale (II), dans laquelle R1 et R2 représentent chacun, indépendamment, alkyle C1-12 ; ou R1 et R2 s'assemblent avec l'atome d'azote auquel ils sont attachés pour former un cycle amine alicyclique contenant entre 4 et 7 atomes de carbone ou un cycle morpholine, et un ester d'acide acétique de formule générale (III), dans laquelle R est tel que défini dans la formule (I), en présence d'une base.

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