ClC1C=CC(C(OC)=O)=C(C=CC(O)=O)C=1.[Cl:17][C:18]1[CH:27]=[CH:26][C:21]([C:22]([O:24][CH3:25])=[O:23])=[C:20]([CH:28]=[CH:29][C:30]([O:32][CH3:33])=[O:31])[CH:19]=1>>[Cl:17][C:18]1[CH:27]=[CH:26][C:21]([C:22]([O:24][CH3:25])=[O:23])=[C:20]([CH2:28][CH2:29][C:30]([O:32][CH3:33])=[O:31])[CH:19]=1The same product is obtained using, instead of methyl 4-chloro-2-(3-hydroxy-3-oxo-1-propenyl)-benzoate, methyl 4-chloro-2-(3-methoxy-3-oxo-1 -propenyl)-benzoate from Example 1.
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