Process for producing 2-alkylidene-4-bromoacetoacetic acid...

Details Process for producing 2-alkylidene-4-bromoacetoacetic acid... Process for producing 2-alkylidene-4-bromoacetoacetic acid...

C - Chemistry, Metallurgy

07

C

C07C 67/347 (2006.01) C07C 67/343 (2006.01) C07C 69/738 (2006.01)

Patent

CA 2287663

A process for producing a 2-alkylidene-4-bromoacetoacetic acid ester of the formula (3): Image wherein R1 and R2 each independently represent a lower alkyl group having 1 - 5 carbon atoms, the process is characterized by reacting a 4- bromoacetoacetic acid ester of the formula (1): (see formula I) where R1 has the same meaning as defined above, with an aldehyde of the formula (2): R2CHO ~(2) wherein R2 has the same meaning as defined above, in an inert rganic solvent in the presence of an amine and a carboxylic acid.

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