Essential structural features of (2Z,4E)-5-phenylpenta-2,4-dienoic acid for inhibition of root gravitropism
作者:Mitsuru Shindo、Saki Makigawa、Kenji Matsumoto、Takayuki Iwata、Naoya Wasano、Arihiro Kano、Miyo Terao Morita、Yoshiharu Fujii
DOI:10.1016/j.phytochem.2020.112287
日期:2020.4
bending were determined. The (2E,4E)-, (2Z,4Z)- (2E,4Z)- analogues were inactive, and 4,5-saturated and 4,5-alkynyl analogues also did not show inhibitory activity, demonstrating the importance of the (2Z,4E) diene unit. The aromatic ring was also crucial and could not be replaced with an alkyl chain. Derivatives in which the carboxylic acid was replaced with amides, alcohols, or esters were much less
此前,我们发现 (2Z,4E)-5-苯基五-2,4-二烯酸 (ku-76) 在 5 μM 浓度下是生菜胚根根向重力弯曲的选择性抑制剂,但没有伴随的生长抑制。在这里,我们描述了 ku-76 的结构-活性关系研究,以确定抑制活性的基本结构特征。合成了一系列 ku-76 类似物,并确定了抑制生菜根向重力弯曲所需的 ku-76 关键特征。 (2E,4E)-、(2Z,4Z)- (2E,4Z)- 类似物无活性,4,5-饱和和 4,5-炔基类似物也不显示抑制活性,这证明了 (2E,4Z)- 类似物的重要性( 2Z,4E)二烯单元。芳环也很重要,不能用烷基链代替。羧酸被酰胺、醇或酯取代的衍生物的效力要低得多。这些结果表明,(2Z,4E)-二烯、羧酸部分和芳环对于对向重力弯曲的有效抑制活性至关重要。