Preparation of .alpha.,.beta.-unsaturated...

Details Preparation of .alpha.,.beta.-unsaturated... Preparation of .alpha.,.beta.-unsaturated...

C - Chemistry, Metallurgy

07

C

C07C 59/58 (2006.01) C07C 51/58 (2006.01) C07C 205/40 (2006.01) C07C 309/28 (2006.01) C07C 323/12 (2006.01) C07D 307/54 (2006.01) C07D 309/28 (2006.01) C07D 333/24 (2006.01)

Patent

CA 2105835

- 19 - Abstract of the Disclosure: A process for the preparation of .alpha.,.beta.-unsaturated .beta.-oxycarboxylic acid chlorides of the formula I Image I where R1 is a C-organic radical, and R2 and R3, indepen- dently of one another, are hydrogen or a C-organic radical, comprises carrying out the addition reaction of an enol derivative of the formula II Image II with a compound of the formula IIIa, IIIb or IIIc Image Image Image ; IIIa IIIb IIIc and converting the resultant acid chloride of the formula IV Image IV into I by elimination of hydrogen chloride (HCl).

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