Preparation of (z)-2-(2-arylethenyl)arylcarboxylic acids

Details Preparation of (z)-2-(2-arylethenyl)arylcarboxylic acids Preparation of (z)-2-(2-arylethenyl)arylcarboxylic acids

C - Chemistry, Metallurgy

07

C

260/508, 260/512

C07C 63/74 (2006.01) C07C 51/353 (2006.01) C07C 205/57 (2006.01) C07C 255/57 (2006.01)

Patent

CA 1297900

O.Z. 0050/38877 Abstract of the Disclosure: (Z)-2-(2-arylethenyl)arylcar- boxylic acids of the general formula I Image (I) where A is a group for completing an aromatic ring system and Ar is an aromatic radical, are prepared by reacting a 2-formylarylcarboxylic acid of the general formula II Image (II) with an (arylmethyl)phosphonium salt of the general formula III Image (III) where R1, R2 and R3 are each organic radicals and X is halogen, in the presence of a base at from (-20) to +30°C by carrying out the reaction in the presence of a C1-C5- alkanol and/or a C2-C4-alkanediol.

555013

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