Benzaldehyde dibutyl acetal

Benzaldehyde dibutyl acetal Benzaldehyde (10.5 g) is heated in an oil-bath with dimethyl sulfite (12 g), 1-butanol (27 g), and a few drops of 20% methanolic hydrogen chloride. Evolution of sulfur dioxide begins in a few minutes. The bath-temperature is then raised to 150-160° during 2 h, while a mixture (20 ml) of methanol with a little butanol distils over (temperature at the column head 65-70°). The residue is fractionated in a vacuum and affords benzaldehyde dibutyl acetal (18.5 g, 80%), b.p. 149-150°/14 mm. 

Benzaldehyde diethyl acetal containing 2 drops of coned. H2SO4 ice-cooled and treated at 26-40 during 3 hrs. with a soln. of peracetic acid in ethyl acetate, and allowed to stand for 20 hrs. ethyl benzoate. Y 90%.—Similarly at 60 without H2SO4 Crotonaldehyde dibutyl acetal butyl crotonate. Y 73%. F. e. s. D. L. Heywood and B. Phillips, J. Org. Chem. 25, 1699 (1960). 

Acetone Amyl formate Benzaldehyde Benzene Benzonitrile Benzyl acetate Bromodichloromethane 2-Butanol Butoxyethanol acetate 1-Butoxyethoxy-2-propanol Butyl alcohol p-t-Butyl toluene Cyclohexane Cyclohexyl acetate Decahydronaphthalene Dibutyl phthalate cis-1,2-Dichloroethylene Diethyl carbonate Diethylene glycol phenyl ether Diethylenetriamine Diethyl oxalaU Diethyl tartrate Diethyl toluamide Dimethyl acetamide Dimethyl adipate... 

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