from Hagemann's ester the preparation of new ketene acetals 4a and 4b and their cycloaddition with juglone derivatives to give ll-deoxytetracyclic alkenes 20 and 21 are described Furthermore the first total synthesis of(±)-auramycinone (8) has been completed from 20 in only nine overall steps from juglone.
从哈格曼的起始酯新烯酮的制备
缩醛图4a和图4b以及它们与
胡桃醌衍
生物的环加成,得到LL-deoxytetracyclic烯烃20和21被进一步描述的第一全合成(±)-auramycinone(8)已经从完成20在距juglone仅9步之遥。