Mono carbonylation of benzene diols
View Patent ↗A process for a mono carbonylation of a benzenediol of the formula (I) is characterized in that a benzene diol of the formula (II) is reacted with an acid anhydride or carbonyl halide of the formula (III) without any organic or inorganic bases for thereby producing a monocarbonylated benzenediol of the formula (I): wherein R is hydrogen, C 1 -C 15 alkyl group, cycle alkyl group, aryl group, alkoxy group, aryloxy group, dialkylamino group, alkylarylamino group or diarylamino group, and X is a general leaving group such as fluoride, chloride, bromide, iodide, acetoxy, etc.
1. A process for a mono carbonylation of a benzenediol of the formula (I) characterized in that a benzene diol of the formula (II) is reacted with an acid anhydride or carbonyl halide of the formula (III) without any organic or inorganic bases for thereby producing a monocarbonylated benzene diol of the formula (I):
wherein R is hydrogen, C 1 -C 15 alkyl group, cyclic alkyl group, aryl group, alkoxy group, aryloxy group, dialkylamino group, alkylarylamino group or diarylamino group, and X is a general leaving group such as fluoride, chloride, bromide, iodide and acetoxy.
2. The process of claim 1 , wherein an excessive amount of the benzenediol of the formula (II) is used with respect to an acyl compound of the formula (III).
3. The process of claim 1 , wherein 1.1-20 equivalent weight of the benzene diol of the formula (II) is used with respect to one equivalent weight of the acyl compound of the formula (III).
4. The process of claim 2 , wherein 1.1-20 equivalent weigh of the benzene diol of the formula (II) is used with respect to one equivalent weigh of the acyl compound of the formula (III).
5. The process of one selected from claim 1 , wherein 2-5 equivalent weight of the benzene diol of the formula (II) which is used in excess with respect to one equivalent weight of the acyl compound of the formula (III).
6. The process of one selected from claim 2 , wherein 2-5 equivalent weight of the benzene diol of the formula (II) which is used in excess with respect to one equivalent weight of the acyl compound of the formula (III).
7. The process of one selected from claim 3 , wherein 2-5 equivalent weight of the benzene diol of the formula (III) which is used in excess with respect to one equivalent weight of the acyl compound of the formula (III).
8. The process of one selected from claim 1 , wherein the unreacted benzene diol of the formula (II) is recovered using a non-polar solvent.
9. The process of one selected from claim 2 , wherein the unreacted benzene diol of the formula (II) is recovered using a non-polar solvent.
10. The process of one selected from claim 3 , wherein the unreacted benzene diol of the formula (II) is recovered using a non-polar solvent.
11. The process of claim 8 , wherein said non-polar solvent is more than one solvent selected from the group consisting of benzene, toluene, xylene, ether, hexane, petroleum ether, methylene chloride and chloroform.
12. The process of claim 1 , wherein as a reaction solvent, more than one solvent selected from the group consisting of tetrahydrofuran, 1,4-dioxane, acetonitrile, ethyleneglycol dimethylether, ethyleneglycol dibutylether, diethyleneglycol dimethylether, triethyleneglycol dimethylether and diisopropylether is used.