[CH:1](O)([OH:4])CC.[Cl:6][C:7]1[CH:12]=[C:11]([Cl:13])[CH:10]=[CH:9][C:8]=1[C:14](=[O:16])[CH3:15].[CH3:17][C:18]1[CH:23]=CC(S(O)(=O)=O)=CC=1.[OH2:28]>CC1C=CC=CC=1>[Cl:6][C:7]1[CH:12]=[C:11]([Cl:13])[CH:10]=[CH:9][C:8]=1[C:14]1([CH3:15])[O:28][CH:18]([CH2:23][O:4][CH3:1])[CH2:17][O:16]1To 53 parts of 3-methoxy-1,2,-propanediol and 75 parts of (2,4-dichlorophenyl)ethanone, dissolved in 170 parts of methylbenzene are added 2 parts of 4-methylbenzene sulfonic acid and the whole is refluxed for 8 hours using a water-separator. The thus obtained methylbenzene solution is washed with water, dried and evaporated in vacuo. The residue is distilled in vacuo, yielding 100 parts of 2-(2,4-dichlorophenyl)-2-methyl-4-(methoxymethyl)-1,3-dioxolane; bp. 111°-115° C. at 4 mm. pressure.
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