| 摘要 |
NEW MATERIAL:Tetrahydro-3-methyl-5-isobutyl-4H-1,3,5-oxadiazin-4-one of the formula. USE:A water-soluble liquid compound useful as a solvent having a high dielectric constant and as functional fluids such as organic electrolytes, media for high- speed ink jet, solubilizing agents, reaction media, etc. for various field. PREPARATION:1-Methyl-3-isobutylurea is reacted with formaldehyde in an amount of preferably 1mol or more, preferably 2.05-2.5mol based on 1mol above-mentioned compound in the presence of an acidic catalyst to give the aimed compound of the formula. After compelting the reaction, an azeotropic solvent, e.g. benzene or toluene, is added to remove the water by the azeotropic distillation under heating. Finally, a suitable dehydrating agent is added to the azeotropic solvent solution of the dimethylolated substance to complete the reaction, and the reaction mixture is refluxed under heating. The dehydrating agent is removed by filtration, etc. |
