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AssigneeIhara Chemical Industry Co., Ltd.
InventorsMasakazu Takahashi, Tomonori Miyazaki, Chika Maejima, Yoshikazu Kimura
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The present invention provides a 2,2-bis(3,5-disubstituted-4-hydroxyphenyl) propane derivative represented by general formula (1) ##STR1## wherein each R.sup.1 represents a hydrogen atom or a lower alkyl group; a process for producing such propane derivative; and a process for producing pyrogallol using such propane derivative. The compound of the present invention has by itself a periphyton-controlling activity required for the active ingredient used in a periphyton-controlling agent such as antifouling paint for ship's bottom, antifouling agent for fishing net, or the like. Further, by decomposing the above compound with an alkali or an acid, pyrogallol can be produced industrially without using any natural material.
A 2,2-bis (3,5-disubstituted-4-hydroxyphenyl)propane derivative represented by formula (1) ##STR5## wherein each R.sup.1 represents a hydrogen atom.
A process for producing a 2,2-bis3,5-di(lower alkoxy)-4-hydroxyphenyl!propane derivative, which is characterized by reacting a 2,2-bis(3,5-dihalogeno-4-hydroxyphenyl) propane derivative represented by formula (2) ##STR6## wherein each X represents a halogen atom, with a metal alkoxide represented by formula (3)
A process for producing 2,2-bis(3,4,5 -trihydroxyphenyl)propane, which is characterized by dealkylating a 2,2-bis3,5-di(lower alkoxy)-4-hydroxyphenyl!propane derivative.
A process for producing pyrogallol, which is characterized by decomposing, with an alkali or an acid, a 2,2-bis(3,5-disubstituted-4-hydroxyphenyl)propane derivative represented by formula (1) ##STR7## wherein each R.sup.1 represents a hydrogen atom or a lower alkylgroup.
Dependencies are inferred from the claim text.