Thio-Ugi reactions are described as an excellent synthetic tool for the synthesis of sterically highly hindered endothiopeptides. S-Methylation and subsequent amidine formation can be carried out in an inter- as well as in an intramolecular fashion. The intramolecular approach allows the synthesis of the bottromycin ring system in a straightforward manner.
Thio-Ugi反应被描述为合成高度立体阻碍的内硫肽类的优秀合成工具。S-甲基化和随后的酰胺形成可以以分子内或分子间的方式进行。分子内方法可以直接合成bottromycin环系统。