Improved methods have been devised for the isolation of (+)-conocurvone
(1) from the roots of Conospermum brachyphyllum Lindl.
and for its synthesis. The isolation of
(R)-(+)-9-hydroxy-3-(4′-hydroxy-4′-methylpentan-1′-yl)-3,8-dimethyl-3H-naphtho[2,1-b]pyran-7,10-dione
[(+)-brachyphyllone] (2), a minor constituent of this species,
its structural elucidation and partial synthesis are also described.
8-C-Methylteretifolione-B (9) and
8-C-methyl-9-O-methylteretifolione-B (10), as well as
the previously isolated (+)-teretifolione-B (8), also occur in this
plant.
从 Conospermum brachyphyllum Lindl.
(1) 的改进方法。
及其合成的改进方法。分离出
(R)-(+)-9-hydroxy-3-(4′-hydroxy-4′-methylpentan-1′-yl)-3,8-dimethyl-3H-naphtho[2,1-b]pyran-7,10-dione
(+)-brachyphyllone](2),该物种的一种次要成分、
还介绍了其结构阐明和部分合成。
8-C-Methylteretifolione-B (9) 和
8-C-甲基-9-O-甲基三乙酮-B(10)以及
之前分离出的 (+)-teretifolione-B (8),也出现在这种植物中。
植物中。