The preparation of 4-alkanoylaryl benzyl ethers

Details The preparation of 4-alkanoylaryl benzyl ethers The preparation of 4-alkanoylaryl benzyl ethers

C - Chemistry, Metallurgy

07

C

C07C 251/48 (2006.01) C07C 65/40 (2006.01) C07C 69/736 (2006.01) C07C 235/34 (2006.01) C07C 235/80 (2006.01) C07C 255/64 (2006.01) C07C 327/22 (2006.01) C07D 207/34 (2006.01) C07D 213/50 (2006.01) C07D 213/54 (2006.01) C07D 231/12 (2006.01) C07D 233/64 (2006.01) C07D 239/26 (2006.01) C07D 307/54 (2006.01) C07D 333/24 (2006.01)

Patent

CA 2121424

21 Process for preparing 4-alkanoylaryl benzyl ethers Abstract A process for preparing 4-alkanoylaryl benzyl ethers of the gen- eral formula I Image I where R is hydrogen, halogen, cyano; alkyl, alkoxy; X is CH2, CH-CH3, CH-CH2-CH3, CH-OCH3 or N-OCH3; Y is oxygen, sulfur, direct linkage or nitrogen; m is 0, 1, 2 or 3; R1 is hydrogen; alkyl, alkenyl, alkynyl or alkoxy; R2 is cyano, halogen, alkyl, alkoxy or haloalkyl; R3 is alkyl; haloalkyl; cycloalkyl; or an unsubstituted or substi- tuted mono- to trinuclear aromatic system, comprises reacting an aryl benzyl ether of the general formula II Image II 22 where X, Y, R, R1, R2 and m have the abovementioned meanings, with a carbonyl halide or with a carboxylic anhydride or with a carboxylic sulfonic anhydride in the presence of an acid and in the presence or absence of a diluent.

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