Cordybislactone (3), a new stereoisomer of the 14-membered bislactone clonostachydiol, together with its open ring analog (4), was isolated from the hopper pathogenic fungus Cordyceps sp. BCC 49294. The relative and absolute configurations of 3 were determined by chemical derivatizations, including the modified Mosherâs method. The stereochemistry of clonostachydiol was determined using the natural compound isolated from Xylaria sp. BCC 4297. The result revealed that the absolute configuration of clonostachydiol, previously determined by synthesis, should be revised to its enantiomer.
Cordybislactone (3)是一种新的14元双内
酯克隆石
蜡醇的立体异构体,以及其开放环类似物(4),从跳虫病原真菌Cordyceps sp. BCC 49294中分离出来。通过
化学衍生反应,包括改进的Mosher法,确定了3的相对和绝对构型。克隆石
蜡醇的立体
化学是通过从Xylaria sp. BCC 4297中分离的
天然化合物来确定的。结果表明,之前通过合成确定的克隆石
蜡醇的绝对构型应修正为其对映体。