C(=O)([O-])[O-].[Na+].[Na+].O.[Cl:8][C:9]1[CH:14]=[CH:13][CH:12]=[C:11]([C:15]([O:17][OH:18])=[O:16])[CH:10]=1.[Cl:19][CH:20]([CH2:24][CH3:25])[C:21](Cl)=[O:22]>C(Cl)(Cl)Cl>[Cl:8][C:9]1[CH:10]=[C:11]([CH:12]=[CH:13][CH:14]=1)[C:15]([O:17][O:18][C:21](=[O:22])[CH:20]([Cl:19])[CH2:24][CH3:25])=[O:16]To 6.4 g. (0.06 moles) anhydrous sodium carbonate in 60 cc. H2O was added 10.2 g. (0.05 moles) of m-chloroperbenzoic acid of 84.35% purity. The stirred mixture was chilled to -2° C. and 8.5 g. (0.06 moles) 2-chlorobutyryl chloride in 30 cc. chloroform was added over 17 minutes. After a total reaction time of 60 minutes, the reaction was worked up as in Example I and gave 15.2 g. product. Product A.O. analysis: theory, 5.77; found, 5.15; 89.30% pure; 97.7% yield.
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