Preparation of 3-substituted formylcatechol
专利汇可以提供Preparation of 3-substituted formylcatechol专利检索，专利查询，专利分析的服务。并且PURPOSE: To obtain the titled compond useful as an intermediate for drugs selectively in high yield, by oxidizing a specific 2-substituted 4,6-diformylphenol as a raw material with hydrogen peroxide in the presence of a catalyst, e.g., copper compound in a basic aqueous solution.
CONSTITUTION: A 2-substituted 4,6-diformylphenol shown by the formulaI(X is alkoxy, alkyl, halogen, or H) is neutralized with an equivalent weight of a basic aqeuous solution of NaOH, etc. Afte adding a catalyst of a copper compound or silver compound to the phenol, it is oxidized with hydrogen peroxide in the form an aqueous solution while being kept at 0W25°C until a pH value of the reaction solution exhibits apporoximately 4 at 0W45°C, to give the desired compound shown by the formula II. A water-soluble compound, e.g., CuSO
4 , AgNO
3 , CuCl
2 ,C
u
( NO
3 )
2 , Cu(PO
4 )
2 , etc. is used as the catalyst.
USE: A raw material especially for 3,4,5-trimethoxybenzaldehyde, etc.
COPYRIGHT: (C)1982,JPO&Japio，下面是Preparation of 3-substituted formylcatechol专利的具体信息内容。
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