Synthesis of 3-Substituted Isocoumarins and Their Inhibitory Effects on Degranulation of RBL-2H3 Cells Induced by Antigen
作者:Ai Kurume、Yasuhiro Kamata、Masayuki Yamashita、Qilong Wang、Hisashi Matsuda、Masayuki Yoshikawa、Ikuo Kawasaki、Shunsaku Ohta
DOI:10.1248/cpb.56.1264
日期:——
Eleven 3-substituted isocoumarins and a benzylidenephthalide were synthesized through thermal cyclization reaction of δ- and γ-ketoamides, respectively. Subsequent deprotection of the hydroxyl groups of the resulting isocoumarin and benzylidenephthalide compounds afforded thunberginols A, B, and F, respectively, which originated from the processed leaves of Hydrangea macrophylla SERINGE var. thunbergii MAKINO. The synthesized isocoumarins and thunberginols were evaluated for their anti-allergic activity, in which thunberginol B exhibited the highest inhibitory potency on the degranulation of RBL-2H3 cells induced by antigen. Structure–activity relationship studies were carried out to determine the necessary substituents on the 3-phenylisocoumarin skeleton for inhibitory activity.
合成了十一种3-取代异香豆素和一个苄叉邻苯二甲酸酯,这些化合物分别通过δ-和γ-酮酰胺的热环化反应得到。随后的去保护反应使得所得的异香豆素和苄叉邻苯二甲酸酯化合物分别获得了来自紫阳花(Hydrangea macrophylla SERINGE var. thunbergii MAKINO)加工叶子的thunberginols A、B和F。合成的异香豆素和thunberginols被评估其抗过敏活性,其中thunberginol B对抗原诱导的RBL-2H3细胞去颗粒化展现了最高的抑制效力。进行了结构—活性关系研究,以确定3-苯基异香豆素骨架上抑制活性所需的取代基。