申请人:MITSUBISHI GAS CHEMICAL COMPANY, INC.
公开号:EP4019490A1
公开(公告)日:2022-06-29
An object of the present invention is to provide a method for producing m-dialkylbenzaldehyde by using a reaction starting material containing 1,4-dialkylbenzene. The method for producing m-dialkylbenzaldehyde represented by formula (3), comprising a step of allowing carbon monoxide to react on a reaction starting material containing 1,4-dialkylbenzene represented by formula (1) in the presence of a Bronsted acid and a Lewis acid, wherein the reaction starting material is 1,4-dialkylbenzene represented by formula (1), or a mixture of 1,4-dialkylbenzene represented by formula (1) and 1,3-dialkylbenzene represented by formula (2), containing 10 mol% or more of the 1,4-dialkylbenzene represented by formula (1),
wherein in formulae (1) to (3), R1 represents a methyl group or an ethyl group, and R2 represents a chain or cyclic alkyl group having 3 or more and 6 or less carbon atoms that has a tertiary carbon at the benzyl position.
本发明的目的是提供一种利用含有 1,4-二烷基苯的反应起始原料生产间二烷基苯甲醛的方法。生产式(3)所代表的间二烷基苯甲醛的方法,包括以下步骤:在勃朗斯特酸和路易斯酸存在下,使一氧化碳与含有式(1)所代表的 1,4-二烷基苯的反应起始原料发生反应、其中,反应起始原料为式(1)代表的 1,4-二烷基苯,或式(1)代表的 1,4-二烷基苯和式(2)代表的 1,3-二烷基苯的混合物,其中式(1)代表的 1,4-二烷基苯的含量为 10 摩尔%或更多、
其中,在式(1)至式(3)中,R1 代表甲基或乙基,R2 代表具有 3 个或 3 个以上和 6 个或 6 个以下碳原子的链状或环状烷基,该烷基在苄基位置上具有一个叔碳。