The Diels-Alder adduct obtained from (E)-6-bromo-3-ethoxycarbonylmethylene-2-oxoindoline and trans-1, 3-pentadiene was successfully transformed into the diacetate of the aglycone of neosurugatoxin, which is the key intermediate in our first total synthesis of neosurugatoxin in 16 steps.
由(E)-6-
溴-3-乙氧羰基亚甲基-2-氧代
吲哚啉和反式-1, 3-
戊二烯得到的 Diels-Alder 加合物成功转化为新
脲霉素苷元的二
乙酸酯,这是我们首次通过 16 个步骤全合成新
脲霉素的关键中间体。