Preparation of 4-alkanoylaryl benzyl ethers
A process for preparing 4-alkanoylaryl benzyl ethers of the general formula I 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;...
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Main Authors | , , , , , |
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Format | Patent |
Language | English |
Published |
04.07.1995
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Edition | 6 |
Subjects | |
Online Access | Get full text |
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Summary: | A process for preparing 4-alkanoylaryl benzyl ethers of the general formula I 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 substituted mono- to trinuclear aromatic system, comprises reacting an aryl benzyl ether of the general formula II II 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.
A process for preparing 4-alkanoylaryl benzyl ethers of the general formula I 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 substituted mono- to trinuclear aromatic system, comprises reacting an aryl benzyl ether of the general formula II II 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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Bibliography: | Application Number: US19940228379 |