| 摘要 |
PURPOSE:To obtain a novel compound useful as a base for cosmetic, cosmetic retainer, antioxidant, etc. CONSTITUTION:A compound expressed by the formula (R1 is 4-30C alkyl, arylalkyl, alkenyl or arylalkenyl; R<2> is H, 1-30C alkyl or alkenyl). The compound by the formula is obtained by e.g. adding n-octylaldehyde, L-ascorbic acid, p-toluenesulfone hydrate, DMF and benzene to 5,6-0-oxtylidene-Lascorbic acid and reacting these components under reflux on heating while removing water produced by the condensation reaction out of the system by azetrope. |
