Total synthesis of verticillene. A biomimetic approach to the taxane family of alkaloids
作者:Michael J. Begley、Christopher B. Jackson、Gerald Pattenden
DOI:10.1016/s0040-4020(01)85602-7
日期:1990.1
coupling of the -aldehyde (10) in the presence of Ti(O), followed by 1,4-reducdon of the resulting tetraene (9) using sodium in ammonia, provides a facile synthesis of ,-verticillene (8), the putative biogenetic precursor of the taxane family of alkaloids e.g. (1) and (2). Treatment of either verticillene (8), verticillene 7,8-epoxide (21), verticillol 7,8-epoxide (27) or anhydroverticillol 7,8-epoxide
所述的分子内还原偶联以Ti(O)的存在下-醛(10),然后通过使用氨钠所得到的四烯(9)的1,4- reducdon,提供的简便合成,-verticillene(8),紫杉烷类生物碱的推定生物遗传前体,例如(1)和(2)。任一verticillene(8)的处理,verticillene 7,8-环氧化物(21),verticillol 7,8-环氧化物(27)或anhydroverticillol 7,8-环氧化物(29)与路易斯酸不能产生相应的紫杉烷碳骨架,即(3),取而代之的是仅获得由基材中环氧环的重排产生的产物,例如(23),(24)和(31)。