Twenty-eight tetraketones (1-28) with variable substituents at C-7 were synthesized and evaluated as tyrosinase inhibitors. Remarkably compounds 25 (IC50 = 2.06 mu M), 11 (IC50 = 2.09 mu M), 15 (IC50 = 2.61 mu M), and 27 (IC50 = 3.19 mu M) were found to be the most active compounds of the series, even better than both standards kojic acid (IC50 = 16.67 mu M) and L-mimosine (IC50 = 3.68 mu M). This study may lead to the discovery of therapeutically potent agents against clinically very important dermatological disorders including hyperpigmentation as well as skin melanoma. (c) 2005 Elsevier Ltd. All rights reserved.
METHONE DERIVATIVES OF ALDEHYDES
作者:E. C. HORNING、M. G. HORNING
DOI:10.1021/jo01171a014
日期:1946.1
Synthesis of tetra- and octahydroxanthene derivatives by the condensation of dimedone with aromatic aldehydes
作者:A. N. Pyrko
DOI:10.1007/bf01164861
日期:1996.6
A Green and Highly Efficient Protocol for Catalyst-free Knoevenagel Condensation and Michael Addition of Aromatic Aldehydes with 1,3-Cyclic Diketones in PEG-400
作者:Nemati Firouzeh、Kiani Hossein
DOI:10.1002/cjoc.201100005
日期:2011.11
A convenient, highlyefficient and green approach for synthesis of tetraketones from aromaticaldehydes with dimedone and 1,3‐indanedione at room temperature in PEG‐400 is described. The use of PEG‐400 as the reaction medium and avoiding the use of any catalyst makes the process environmentally benign. Seven new compounds are reported.