Therefore, the development of a process that affords the cyclic dimer predominantly is difficult. A novel and versatile strategy for the synthesis of symmetric cyclo‐tetrapeptides by palladium‐promoted tandem deprotection/cyclo‐dimerization from readily available Cbz‐dipeptidoyl benzotriazolides is reported (Cbz=carboxybenzyl).
二聚-大环化一直是肽环化中的一个长期问题,因为在反应过程中还可能与所需的环状产物一起形成许多环状低聚物和线性聚合物。因此,难以开发主要提供环状二聚体的方法。据报道,通过
钯促进的串联脱保护/环二聚反应,可以从容易获得的Cbz-二肽基苯甲酰三唑化物(Cbz =羧基苄基)合成对称环四肽的新型新颖方法。