Malonic Acid → 3-(2,4-Difluoro-3-methyl-phenyl)-acrylic acid
Reaktionsgleichung
[F:1][C:2]1[C:9]([CH3:10])=[C:8]([F:11])[CH:7]=[CH:6][C:3]=1[CH:4]=O.C(O)(=O)[CH2:13][C:14]([OH:16])=[O:15]>>[F:1][C:2]1[C:9]([CH3:10])=[C:8]([F:11])[CH:7]=[CH:6][C:3]=1[CH:4]=[CH:13][C:14]([OH:16])=[O:15]Komponenten
3
Versuchsvorschrift
According to the previously described general procedure (GP1), Knoevenagel condensation (75° C.; 3h30) between 2,4-difluoro-3-methyl-benzaldehyde (1.560 g; 9.744 mmol) and malonic acid (1.926 g; 18.515 mmol) gave the product 3-(2,4-difluoro-3-methyl-phenyl)-acrylic acid as a pale yellow solid (1.600 g; 83%). LC-MS: tR=0.86 min; [M+H]+: no ionisation.
Quellen und Nachweise
- ORD-Eintrag
- ord-df10f7ca732c48608ccd88a057c12193
- Quelldatensatz
- uspto-grants-2012_05
- Patentnummer
- US08188082B2
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