Methacrolein → 1-Acetoxy-2-Methyl-3-(3,4-Methylenedioxyphenyl)Propene
Reaction equation
[CH2:1]1[O:9][C:4]2[CH:5]=[CH:6][CH:7]=[CH:8][C:3]=2[O:2]1.[O:10]=[CH:11][C:12](=[CH2:14])[CH3:13].[C:15](OC(=O)C)(=[O:17])[CH3:16]>>[C:15]([O:10][CH:11]=[C:12]([CH3:13])[CH2:14][C:6]1[CH:7]=[CH:8][C:3]2[O:2][CH2:1][O:9][C:4]=2[CH:5]=1)(=[O:17])[CH3:16]Participants
4
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. (3) Production Process (C):
Sources & evidence
- ORD record
- ord-8c3a433f9ff149fd95bae37866494914
- Source dataset
- uspto-grants-2013_05
- Patent number
- US08450508B2
Reaction notes
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