Structures of three new 2-arylbenzofuran derivatives from the chinese crude drug "Sang-Bai-Pi" (morus root bark).
作者:YOSHIO HANO、HIDEAKI KOHNO、MASATO ITOH、TARO NOMURA
DOI:10.1248/cpb.33.5294
日期:——
Three new 2-arylbenzofuran derivatives named mulberrofurans K, N, and O were isolated from the extract of the Chinese crude drug "Sang-Bai-Pi" (Japanese name "Sohakuhi"), the root bark of Morus sp. (Moraceae). The structures of mulberrofurans K, N and O were shown to be 1, 2, and 3, respectively, on the basis of spectral and chemical evidence. Mulberrofurans K and O are optically active and may be regarded biogenetically as Diels-Alder type adducts of chalcone derivatives and a dehydroprenyl-2-arylbenzofuran derivative. Furthermore, mulberrofuran K seems to be derived from the Diels-Alder type adduct by intramolecular ketalization.
从中药“桑白皮”(日本名“Sohakuhi”)的提取物中分离出三种新的2-芳基苯并呋喃衍生物,分别命名为桑白皮呋喃K、N和O,桑白皮是桑科植物桑的根皮。根据光谱和化学证据,桑白皮呋喃K、N和O的结构分别为1、2和3。桑白皮呋喃K和O具有光学活性,在生物遗传学上可视为查尔酮衍生物和脱氢异戊烯基-2-芳基苯并呋喃衍生物的Diels-Alder型加合物。此外,桑白皮呋喃K似乎是通过分子内缩合从Diels-Alder型加合物中衍生而来的。