| abstract |
The invention relates to a process for the preparation of a pyrogallol compound for use, for example, as a photographic developer. The object of the invention is to provide a simple and economical process with which pyrogallol can be produced fully synthetically. The invention relates to a pyrollolol compound of the formula I or its salts, where R 1 is a hydrogen atom, an alkyl, a carboxyl or an alkoxy-kabonyl, in which Prepared such that a carbonyl compound of formula II is oxidized, wherein R is high 2, R is high 3 and R 4 are the same or different, and each of them is -OH or -COR 5, and at least one of R is high 2, R is high or R is high, OH is 4 and at least one of R is H 2, R is H 3 and R 4 is high -COR 5, where R 5 is a hydrogen atom, an alkyl or a phenylalkyl. |