Synthesis of Tyrosinase Inhibitory Kojic Acid Derivative
作者:Yong Sup Lee、Jang Hyun Park、Min Hwan Kim、Seon Hee Seo、Hyoung Ja Kim
DOI:10.1002/ardp.200500213
日期:2006.3
Kojicacidderivative 2 was synthesized by joining two pyrone rings through an ethylene linkage by Horner‐Emmons reaction of phosphonate 6 with aldehyde 7. The intermediates 6 and 7 were derived from kojicacid. The tyrosinaseinhibitory activity of 2 was about 8 times more potent (IC50 = 3.63 μM) than that of kojicacid (IC50 = 30.61 μM). Compound 2 also exhibited potent melanin synthesis inhibitory
Synthesis of tyrosinase inhibitory (4-oxo-4H-pyran-2-yl)acrylic acid ester derivatives
作者:Soo Sung Kang、Hyoung Ja Kim、Changbae Jin、Yong Sup Lee
DOI:10.1016/j.bmcl.2008.10.119
日期:2009.1
Melanogenesis is a physiological process that results in the production of melanin pigment. However, excessive accumulations of epidermal pigmentation can cause various hyperpigmentary disorders such as, melasma and age spots. Kojic acid and hydroxylated cinnamic acid derivatives are known to inhibit tyrosinase, a key component of melanin biosynthesis. Pyronyl-acrylic acid esters 3a-i, which share structural features of kojic acid and hydroxylated cinnamic acid, were prepared and their abilities to inhibit tyrosinase and melanin production were evaluated. Of the esters synthesized, 3e and 3h, which derived from diethylene glycol moieties were found to inhibit melanin production by ca. 20% at 20 mu g/ml, whereas kojic acid at 200 mu g/ml inhibited melanin production by 15.8%. (C) 2008 Elsevier Ltd. All rights reserved.