[Br:1][CH2:2][C:3]([C:5]1[CH:10]=[CH:9][C:8]([Cl:11])=[CH:7][CH:6]=1)=[O:4].[CH2:12]([OH:19])[C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1.[C:20]1(C)C=CC(S(O)(=O)=O)=CC=1.C1C=CC=CC=1>C(O)C>[Br:1][CH2:2][C:3]1([C:5]2[CH:10]=[CH:9][C:8]([Cl:11])=[CH:7][CH:6]=2)[O:19][CH:12]([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=2)[CH2:20][O:4]1A mixture of 11.6 parts of 2-bromo-4'-chloroacetophenone, 8.4 parts of α-hydroxymethyl)benzylalcohol, 0.1 parts of p-toluene sulfonic acid, 210 parts of benzene and 40 parts of ethanol is stirred and refluxed for 24 hours. The reaction mixture is evaporated and the residue is triturated in methanol. The product is filtered off and crystallized from methanol, yielding 2-(bromomethyl)-2-(p-chlorophenyl)-4-phenyl-1,3-dioxolane; mp. 60°C.
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