作者:Jun-Wei He、Da-Peng Qin、Hao Gao、Run-Qiao Kuang、Yang Yu、Xing-Zhong Liu、Xin-Sheng Yao
DOI:10.3390/molecules191220880
日期:——
Two new coumarins, talacoumarins A (1) and B (2), were isolated from the ethyl acetate extract of the wetland soil-derived fungus Talaromyces flavus BYD07-13. Their structures were elucidated by spectroscopic data (NMR, MS) analyses. The absolute configuration of C-12 in 1 was assigned using the modified Mosher’s method, whereas that of C-12 in 2 was deduced via the circular dichroism data of its corresponding [Rh2(OCOCF3)4] complex. Compounds 1 and 2 were evaluated for their anti-Aβ42 aggregation, cytotoxic, and antimicrobial activities. The results showed that the two compounds had moderate anti-Aβ42 aggregation activity, and this is the first report on the Aβ42 inhibitory aggregation activity of coumarins.
从源自湿地土壤的真菌 Talaromyces flavus BYD07-13 的乙酸乙酯提取物中分离出了两种新的香豆素--塔拉香豆素 A(1)和 B(2)。通过光谱数据(核磁共振、质谱)分析阐明了它们的结构。化合物 1 中 C-12 的绝对构型是通过改进的莫舍尔法确定的,而化合物 2 中 C-12 的绝对构型则是通过其相应 [Rh2(OCOCF3)4] 复合物的圆二色性数据推断出来的。对化合物 1 和 2 的抗 Aβ42 聚集、细胞毒性和抗菌活性进行了评估。结果表明,这两种化合物具有中等程度的抗 Aβ42 聚集活性,这是首次报道香豆素类化合物的 Aβ42 抑制聚集活性。