Abstract
Benzaldehyde was obtained by the reaction of benzyl halides with dimethylformamide (DMF), dimethylacetamide or N-methyl-2-pyrrolidone. A mixture of benzyl bromide, sodium bicarbonate and excess DMF was stirred under nitrogen at 150°C for 2 hours.
Benzaldehyde was isolated as the 2, 4-dinitrophenylhydrazone (A), mp 234235°C, in the yield of 24.5%.
(A) was not obtained by use of benzyl chloride, but was obtained in 10.5% yield by the addition of 11 mol% of p-toluenesulfonic acid as a catalyst.
