Structural characteristics of thiosemicarbazones as inhibitors of melanogenesis
摘要:
A series of thiosemicarbazones 2(e-s) have been synthesized and studied their structure-activity relationship as melanogenesis inhibitor. Among them, (Z)-2-(naphthalen-1-ylmethylene) hydrazinecarbothioamide (2q, >100% inhibition at 10 mu M, IC50 = 1.1 mu M, C log P = 3.039) showed the strongest inhibitory activity. Regarding their structure-activity relationship, the hydrophobic substituents regardless the position on phenyl ring of benzaldehyde thiosemicarbazones enhance the inhibitory activity. Furthermore, the aromatic group of benzaldehydethiosemicarbazones can be replaced with sterically bulky cyclohexyl. Thus, hydrophobicity of the aryl or alkyl group on hydrazine of thiosemicarbazones is determinant factor for their inhibitory activity in melanogenesis rather than planarity. (C) 2010 Elsevier Ltd. All rights reserved.
[EN] An antifungal seed dressing having a formulation (I) in the form of a liquid including a thiosemicarbazone and a solvent having the following general formula HO-[CH(R4)-CH(R5)-O]n-R where R1 is alkyl or substituted alkyl having 1-6 carbon atoms, R4 and R5 is hydrogen or methyl and n=1-4 or having a formulation (II) including a thiosemicarbazone in the form of a suspension concentrate combined with an emulsified oil. [FR] La présente invention a pour objet un enrobage de graine antifongique de formule (I) sous forme d'un liquide incluant une thiosemicarbazone et un solvant de formule générale suivante HO-[CH(R4)-CH(R5)-O]n-R où R1 représente un groupement alkyle éventuellement substitué en C1-C6, R4 et R5 représentent un atome d'hydrogène ou un groupement méthyle et n=1-4, ou de formule (II) incluant une thiosemicarbazone sous forme d'une suspension concentrée associée à une huile émulsifiée.
Structural characteristics of thiosemicarbazones as inhibitors of melanogenesis
作者:Ki-Cheul Lee、Pillaiyar Thanigaimalai、Vinay K. Sharma、Min-Seok Kim、Eunmiri Roh、Bang-Yeon Hwang、Youngsoo Kim、Sang-Hun Jung
DOI:10.1016/j.bmcl.2010.08.114
日期:2010.11
A series of thiosemicarbazones 2(e-s) have been synthesized and studied their structure-activity relationship as melanogenesis inhibitor. Among them, (Z)-2-(naphthalen-1-ylmethylene) hydrazinecarbothioamide (2q, >100% inhibition at 10 mu M, IC50 = 1.1 mu M, C log P = 3.039) showed the strongest inhibitory activity. Regarding their structure-activity relationship, the hydrophobic substituents regardless the position on phenyl ring of benzaldehyde thiosemicarbazones enhance the inhibitory activity. Furthermore, the aromatic group of benzaldehydethiosemicarbazones can be replaced with sterically bulky cyclohexyl. Thus, hydrophobicity of the aryl or alkyl group on hydrazine of thiosemicarbazones is determinant factor for their inhibitory activity in melanogenesis rather than planarity. (C) 2010 Elsevier Ltd. All rights reserved.