Molecular design of potent, hydrophilic tyrosinase inhibitors based on the natural dihydrooxyresveratrol skeleton
摘要:
In this study, dihydrooxyresveratrol glucosides 3-6 were synthesized for the first time to the best of our knowledge by the Wittig reaction and Schmidt glycosylation as key steps for the purpose of developing novel hydrophilic tyrosinase inhibitors. Results obtained from inhibitory studies revealed 50% inhibitory concentration (IC50) values of 12.80 mu M and 2.63 mu M for 4-resorcinol glucosides 3 and 4, respectively. The IC50 value of 4 was approximately 4 times greater than that of kojic acid, which is a typical tyrosinase inhibitor. In contrast, 5-resorcinol glucosides 5 and 6 exhibited tyrosinase-inhibitory activity; however their IC(50)s were not estimated within 100 mu M. These results suggested that the discovering 4-resorcinol structure of dihydrooxyresveratrol glucoside is crucial for inducing potent tyrosinase-inhibitory activity.