Synthesis of Karahanaenone Derivatives and Their Inhibition Properties toward Tyrosinase and Superoxide Scavenging Activity<sup>†</sup>
作者:Takahiro Tada、Masato Nomura、Kenji Shimomura、Yoshihito Fujihara
DOI:10.1271/bbb.60.1421
日期:1996.1
Fourteen amides condensing with aminophenols, anisidines, or aniline were synthesized from karahanaenone 1 as the starting material. The tyrosinase inhibitory activity and superoxide scavenging activity of these derivatives were examined in order to develop whitening agents for cosmetics. Of the compounds, N-p-hydroxyphenyl-1,3,3,6-trimethyl-5-cyclohepten-2-on-1-carboxamide 9, 2-hydroxy-N-o-hydroxyphenyl-3,3,6-trimethyl-5-cyclohepten-1-carboxamide 13, and 2-hydroxy-N-p-hydroxyphenyl-3,3,6-trimethyl-5-cyclohepten-1-carboxamide 15 showed strong tyrosinase inhibitory activity. 13 and 5 possessed a hydroxy group in the karahana skeleton and on the aromatic ring, respectively. These inhibitory rates were higher than that of arbutin that is used for commercial cosmetics (77.4%, 73.6%, and 72.3% against 63.0% for arbutin). Furthermore, 13 indicated 51.0% for superoxide scavenging activity.
从卡拉哈奈酮1作为起始材料合成了十四种与氨基酚、乙氧基亚胺或苯胺缩合的酰胺化合物。为了开发用于化妆品的美白剂,研究了这些衍生物的酪氨酸酶抑制活性和超氧化物清除活性。在这些化合物中,N-p-羟基苯基-1,3,3,6-三甲基-5-环庚烯-2-酮-1-羧酰胺9、2-羟基-N-o-羟基苯基-3,3,6-三甲基-5-环庚烯-1-羧酰胺13及2-羟基-N-p-羟基苯基-3,3,6-三甲基-5-环庚烯-1-羧酰胺15表现出强的酪氨酸酶抑制活性。13和5分别在卡拉哈骨架和芳香环上具有羟基。这些抑制率高于用于商业化妆品的阿尔布丁(77.4%、73.6%和72.3%对比阿尔布丁的63.0%)。此外,13的超氧化物清除活性为51.0%。