3,4-Diethoxybenzaldehyde → Methyl 3-(3,4-diethoxyphenyl)prop-2-enoate
Reaktionsgleichung
C1(P(=C=[CH:21][C:22]([O:24][CH3:25])=[O:23])(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[CH2:26]([O:28][C:29]1[CH:30]=[C:31]([CH:34]=[CH:35][C:36]=1[O:37][CH2:38][CH3:39])[CH:32]=O)[CH3:27]>C1(C)C=CC=CC=1>[CH2:26]([O:28][C:29]1[CH:30]=[C:31](/[CH:32]=[CH:21]/[C:22]([O:24][CH3:25])=[O:23])[CH:34]=[CH:35][C:36]=1[O:37][CH2:38][CH3:39])[CH3:27]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
1.81 g (5.40 mmol) of methyl (triphenylphosphoranylidene)acrylate are added, at room temperature, to a solution of 1.0 g (5.15 mmol) of 3,4-diethoxybenzaldehyde and 10 ml of toluene. The reaction is then allowed to proceed for 1 hour at room temperature, the reaction suspension is clarified by filtration over a silica gel bed and the filtrate is evaporated down. Chromatography of the residue over silica gel using toluene/ethyl acetate gives methyl 3(E)-(3,4-diethoxyphenyl)acrylate.