Application of iridium catalyzed allylic substitution reactions in the synthesis of branched tryptamines and homologues via tandem hydroformylation–Fischer indole synthesis
作者:Bojan P. Bondzic、Andreas Farwick、Jens Liebich、Peter Eilbracht
DOI:10.1039/b809143a
日期:——
reactions with a tandem hydroformylation-Fischer indole synthesis sequence as a highly diversity-oriented strategy for the synthesis of tryptamines and homologues was explored. This modular approach allows the substituents at C3 of the indole core, the type of the amine moiety, and the distance of the amine moiety to the indole core in the final synthetic step to be defined. The starting materials required
探讨了对映选择性烯丙基化反应与串联加氢甲酰化-Fischer吲哚合成序列的组合,作为一种高度多样化的策略,用于合成色胺和同源物。通过这种模块化方法,可以定义最终合成步骤中吲哚核的C3处的取代基,胺部分的类型以及胺部分与吲哚核的距离。加氢甲酰化步骤所需的起始原料是通过铱催化的对映选择性烯丙基取代反应以高收率和优异的对映选择性合成的。在苯基肼的存在下,Rh催化的加氢甲酰化步骤使原位形成的醛被捕获为trap。