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Preparation of ortho-methallyloxyphenol

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专利汇可以提供Preparation of ortho-methallyloxyphenol专利检索,专利查询,专利分析的服务。并且PURPOSE: To prepare the titled compound useful as a raw material of carbofuran insecticide and other pesticides, in high yield and selectivity, by reacting catechol with methallyl chloride using a specific amount of ketone as the solvent and using a specific dehydrochlorinating agent within a specific range.
CONSTITUTION: In the preparation of o-methallyloxyphenol by the reaction of catechol with methallyl chloride, the reaction is carried out by using 1W10pts.wt. of a ketone as the reaction solvent based on 1pt.wt. of the catechol, and using a dehydrochlorinating agent comprising one or more bases selected from alkali metal carbonates (e.g. K
2 CO
3 ), alkali metal bicarbonates (e.g. KHCO
3 ) and amines having a pKa of ≥10 (e.g. ethylamine) or the base and KI and/or NaI as the catalyst. The amounts of the alkali metal carbonate, bicarbonate, amine, and catalyst are 0.3W1mol, 0.6W3mol, 0.3W3mol, and 0W1mol per 1mol of catechol, respectively.
COPYRIGHT: (C)1983,JPO&Japio,下面是Preparation of ortho-methallyloxyphenol专利的具体信息内容。

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