Chemical Constituents of Avicennia alba. Isolation and Structural Elucidation of New Naphthoquinones and Their Analogues.
作者:Chihiro ITO、Shinya KATSUNO、Yuichi KONDO、Hugh T.-W. TAN、Hiroshi FURUKAWA
DOI:10.1248/cpb.48.339
日期:——
Three new naphthoquinones and their analogues, named avicequinone-A (1), -B (2), -C (3), and avicenol-A (4), -B (5), -C (6), respectively, were isolated from the stem bark of Avicennia alba (Avicenniaceae) collected in Singapore, and their structures were elucidated by means of spectral methods.Gillan and co-workers have proposed that the structures of the new phytoalexins isolated from Avicennia marina are 1, 2-naphthoquinones 8 and 9. Our synthetic and spectrometric studies showed that these structures should be revised respectively to 1, 4-naphthoquinones 2 and 3, named avicequinone-B and -C by us.
三种新的萘醌及其类似物,分别命名为 avicequinone-A (1)、-B (2)、-C (3) 和 avicenol-A (4)、-B (5)、-C (6)从新加坡采集的白骨壤 (Avicennia alba) 的茎皮中分离出来,并通过光谱方法阐明了其结构。Gillan 及其同事提出,从白骨壤中分离出的新植物抗毒素的结构是 1, 2-萘醌8和9。我们的合成和光谱研究表明,这些结构应分别修改为1, 4-萘醌2和3,我们命名为avicequinone-B和-C。