[OH:1][C:2]1[CH:9]=[CH:8][C:5]([CH:6]=[O:7])=[CH:4][CH:3]=1.Br[CH2:11][CH2:12][CH:13]1[O:18][CH2:17][CH2:16][CH2:15][O:14]1.[I-].[K+].C(=O)([O-])[O-].[K+].[K+]>C(OCC)(=O)C.C(#N)C>[O:14]1[CH2:15][CH2:16][CH2:17][O:18][CH:13]1[CH2:12][CH2:11][O:1][C:2]1[CH:9]=[CH:8][C:5]([CH:6]=[O:7])=[CH:4][CH:3]=1In a 500 ml flask, 120 ml of acetonitrile, 13.8 g of 4-hydroxybenzaldehyde, 21.1 g of 2-(2-bromoethyl)-1,3-dioxane, 1.8 g of potassium iodide, and 35.8 g of potassium carbonate were placed and then, reacted at 80° C. for 5 hrs. Thereafter, 200 ml of ethyl acetate was added to the reaction mixture and washed once with a saturated aqueous potassium carbonate solution, distilled water, and saturated saline. The washed organic phase was dried over anhydrous magnesium sulfate and removed solvent, to give 25.6 g of 4-(2-[1,3]-dioxane-2-yl-ethoxy)benzaldehyde.
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