Total Syntheses of Novel Cytocidal .BETA.-Carboline Alkaloids, Oxopropalines D and G.
作者:Tominari CHOSHI、Takeshi KUWADA、Miyako FUKUI、Yuhji MATSUYA、Eiichi SUGINO、Satoshi HIBINO
DOI:10.1248/cpb.48.108
日期:——
was synthesized by thermal electrocyclic reaction of a 1-azahexatriene system, involving the indole 2,3-bond. The key compound N-methoxymethyl-1-methoxycarbonyl-4-methyl-beta-carboline (2) was then prepared in a four-step sequence. The total synthesis of oxopropaline G (1e) was achieved from this key compound in four steps. Furthermore, the enantioselective total syntheses of (+)-oxopropaline D (1c)
一种新型的β-咔啉核,N-甲氧基甲基-4-甲基-β-咔啉(4)是通过1-氮杂己三烯系统的热电循环反应合成的,其中包括吲哚2,3-键。然后以四步顺序制备关键化合物N-甲氧基甲基-1-甲氧基羰基-4-甲基-β-咔啉(2)。由该关键化合物分四个步骤完成了氧代丙氨酸G(1e)的全合成。此外,通过从2开始的9步应用Sharpless氧化过程,还可以实现(+)-氧代丙胺D(1c)及其对映体的对映选择性全合成。