Structural requirement(s) of N-phenylthioureas and benzaldehyde thiosemicarbazones as inhibitors of melanogenesis in melanoma B 16 cells
                                
                                    
                                        作者:P. Thanigaimalai、Tuan Anh Le Hoang、Ki-Cheul Lee、Seong-Cheol Bang、Vinay K. Sharma、Cheong-Yong Yun、Eunmiri Roh、Bang-Yeon Hwang、Youngsoo Kim、Sang-Hun Jung                                    
                                    
                                        DOI:10.1016/j.bmcl.2010.02.067
                                    
                                    
                                        日期:2010.5
                                    
                                    In order to define the structural requirements of phenylthiourea (PTU), a series of thiourea and thiosemicarbazone analogs were prepared and evaluated as inhibitors of melanogenesis in melanoma B16 cells. The most potent analog was 2-(4-tert-butylbenzylidene)hydrazinecarbothioamide (1u) with an IC50 value of 2.7 mu M in inhibition of melanogenesis. The structure for potent inhibitory activity of these derivatives are required with the direct connection of pi-planar structure to thiourea without steric hinderance in PTU derivatives and the hydrophobic substituent at para position in case of semicarbazones. (C) 2010 Published by Elsevier Ltd.