Reaction equation
[CH3:1][CH:2]([CH2:5][C:6]1[CH:11]=[CH:10][C:9]2[O:12][CH2:13][O:14][C:8]=2[CH:7]=1)[CH:3]=[O:4].C1O[C:18]2C=CC=C[C:17]=2[O:16]1.O=CC(=C)C.C(OC(=O)C)(=O)C>>[C:17]([O:4][CH:3]=[C:2]([CH3:1])[CH2:5][C:6]1[CH:11]=[CH:10][C:9]2[O:12][CH2:13][O:14][C:8]=2[CH:7]=1)(=[O:16])[CH3:18]Participants
5
Procedure
The production process (B) comprises the steps of (3) reacting 1,2-methylenedioxybenzene, methacrolein and acetic anhydride 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 hydrolysis reaction or to transesterification reaction with an alcohol, followed by subjecting the resulting reaction mixture to distillative purification, 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.
Sources & evidence
- ORD record
- ord-3b76881368b9440d85cc63a294f4ce99
- Source dataset
- uspto-grants-2011_10
- Patent number
- US08039649B2
Linked notes
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