A molecule with an indole skeleton, containing a latent acrylic ester function—acting as a diene—was produced from Nb-trityl-2-(hydroxy-methyl)-tryptamine and reacted with esters containing an aldehyde or aldehyde-equivalent structural unit, yielding 3-oxo-16,17-dihydro-Δ20-secodin-17-ol type intermediates from which dehydration, followed by [4+2]cycloaddition, furnished 3-oxovincadifformine and 3-oxominovincine
由N b-三
苯甲基-2-(羟基-
甲基)-
色胺产生具有
吲哚骨架的分子,该分子具有潜在的
丙烯酸酯功能(起二
烯作用),并与含有醛或醛当量结构单元的
酯反应,得到3-
氧代-16,17-二
氢- Δ 20 -secodin -17-醇型
中间体从
脱水,接着[4 + 2]环加成,陈设3- oxovincadifformine和3- oxominovincine。我们还希望将该方法用于生产15β-羟基
长春新碱,但是,观察到具有
吲哚骨架的二聚产物的出现,而不是预期的环加成。