C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/278.1, 260/2
C07C 67/02 (2006.01) C07C 67/03 (2006.01) C07C 69/732 (2006.01) C07C 69/84 (2006.01) C07D 211/46 (2006.01)
Patent
CA 2033846
A-17912/17913/+ Process for the preparation of hydroxyphenylpropionic acid esters Abstract of the disclosure A process for the preparation of compounds of the general formula Image (I), where R1 and R2 are identical or different and are hydrogen, C1-C18alkyl, phenyl, C1-C4alkyl-substituted phenyl, C7-C9phenylalkyl, C5-C12cycloalkyl or C1-C4alkyl-substituted C5-C12cycloalkyl, R3 is hydrogen or methyl, m is 0, 1, 2 or 3, and n is a number from 1 to 4 or 6, and A is as defined in the description, by reacting a compound of the formula II Image (II), where m, R1 and R2 are as defined above, with a compound of the formula III (III), Image where A and n are as defined in the description, which comprisies carrying out the reaction in the presence of a catalyst which contains, as active material, an alkali metal compound of the formula IV MmAn (IV) in which M is Li, Na, K, Rb or Cs, m is the valency of An, and An is a fluoride, hydroxide, phosphate, formate, acetate or -OR5 radical, and R5 is alkyl having 1 to 4 carbon atoms or phenyl, and, as support, an alkaline material which, measured in 10 % strength by weight aqueous suspension, has a pH > 10, selected from one or more groups of substances from the series comprising the alkaline earth metal oxides, hydroxides, aluminates or silicates.
Dubs Paul
Evans Samuel
Major Arpad
Mazour Zdenek
Rusek Milos
Ag Ciba-Geigy
Fetherstonhaugh & Co.
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