Oxalyl chloride → (Z)-5-Fluoro-2-methyl-1-(3,4,5-trimethoxybenzylidene)-3-indenylacetyl chloride
Reaktionsgleichung
[F:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)/[C:7](=[CH:11]\[C:12]1[CH:17]=[C:16]([O:18][CH3:19])[C:15]([O:20][CH3:21])=[C:14]([O:22][CH3:23])[CH:13]=1)/[C:6]([CH3:24])=[C:5]2[CH2:25][C:26]([OH:28])=O.C(Cl)(=O)C([Cl:32])=O>C1COCC1>[F:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)/[C:7](=[CH:11]\[C:12]1[CH:17]=[C:16]([O:18][CH3:19])[C:15]([O:20][CH3:21])=[C:14]([O:22][CH3:23])[CH:13]=1)/[C:6]([CH3:24])=[C:5]2[CH2:25][C:26]([Cl:32])=[O:28]Komponenten
4
Versuchsvorschrift
(Z)-5-fluoro-2-methyl-1-(3,4,5-trimethoxybenzylidene)-3-indenylaceticacid (20.64 g, 54.70 mmol) in THF (150 ml) is allowed to react with oxalylchloride (2 M in CH2Cl2 ; 35 ml; 70 mmol) under reflux conditions (24 h). The solvent is evaporated to yield the title compound, which is used as such in the next step.