Patent ID: 8039649

Claim:
A process for producing 2-methyl-3-(3,4-methylenedioxyphenyl)propanal, comprising: (1) reacting 1,2-methylenedioxybenzene and 2-methyl-3,3-diacetoxypropene with each other to produce 1-acetoxy-2-methyl-3-(3,4-methylenedioxyphenyl)-1-propene; and (2) subjecting the obtained 1-acetoxy-2-methyl-3-(3,4-methylenedioxyphenyl)-1-propene to a hydrolysis reaction or to a transesterification reaction with an alcohol, followed by subjecting the resulting reaction mixture to distillative purification, to thereby obtain a 97% or more purity of the 2-methyl-3-(3,4-methylenedioxyphenyl)propanal and to thereby adjust a content of 1-acetyl-3,4-methylenedioxybenzene as a by-product in the 2-methyl-3-(3,4-methylenedioxyphenyl)propanal to from 50 to 3000 ppm.