Acetate → Methyl 4-(4-oxobutyl)benzoate

Reaction equation

[CH2:32]([Cl:33])[Cl:34].[CH2:35]([O:36][CH2:37][CH3:38])[CH3:39].[CH3:13][C:14](=[O:15])[O-:16].[Na+:12].[O:1]=[Cr:2]([Cl:3])([O-:4])=[O:5].[OH:17][CH2:18][CH2:19][CH2:20][CH2:21][c:22]1[cH:23][cH:24][c:25]([C:26](=[O:27])[O:28][CH3:29])[cH:30][cH:31]1.[nH+:6]1[cH:7][cH:8][cH:9][cH:10][cH:11]1>>[O:17]=[CH:18][CH2:19][CH2:20][CH2:21][c:22]1[cH:23][cH:24][c:25]([C:26](=[O:27])[O:28][CH3:29])[cH:30][cH:31]1