Indolylglycines Backbones in the Synthesis of Enantiopure 3,3-Spiroindolenines, Indolyl Tetracyclic Hemiaminals, and 3-Indolyl-maleimides Frameworks
作者:Jozef Markus、Branislav Ferko、Dušan Berkeš、Ján Moncol、Ata Martin Lawson、Mohamed Othman、Adam Daïch
DOI:10.1002/ejoc.201900814
日期:2019.9.8
Racemic and enantiopure 3‐indolylglycines (3IGs) were synthesized in high yields and optical purity by using a simple and efficacious Mannich 3CR. A multigram synthesis using (R)‐PEA as chiral auxiliary was realized. The resulting 3IGs were used to provide enantiopure 3,3‐spiroindolenines, indolyl tetracyclic hemiaminals, and 3‐indolylmaleimides following an unexpected pathway.
外消旋和对映体纯的3-吲哚基甘氨酸(3IG)通过使用简单有效的Mannich 3CR以高收率和光学纯度合成。实现了使用(R)-PEA作为手性助剂的多重谱合成。产生的3IGs用于通过意外途径提供对映纯3,3-螺吲哚啉,吲哚基四环缩醛和3-吲哚基马来酰亚胺。