| 摘要 |
NEW MATERIAL:A compound of formula I (wavy lines represent axial or equatorial bonds). EXAMPLE:Methyl-4,6-0-[3-(1-methylcyclohexen-4-yl)butylidene]-alpha,D-g luco- pyranoside. USE:Flavor-maintaining agent. PREPARATION:Methyl-D-glucoside of formula II is allowed to react with limonene aldehyde dimethyl acetal in an organic solvent such as DMF or dichloro-ethane in the presence of an acid such as p-toluenesulfonic acid or sulfuric acid, preferably at a molar ratio of 1:(0.5-2), for example at 40-150 deg.C for 1-6 hours. |
