Chemical ligation from O-acyl isopeptides via 8- and 11-membered cyclic transition states
作者:Siva S. Panda、Mohamed Elagawany、Hadi M. Marwani、Eray Çalɪşkan、Mirna El-Katib、Alexander Oliferenko、Khalid A Alamry、Alan R Katritzky
DOI:10.3998/ark.5550190.p008.632
日期:——
Unprotected O-acylated serine and O-acylated threonine isopeptides have been synthesized, and their conversion to native tripeptides and tetrapeptides by O- to N-terminus transfer investigated. Ligations involving 8- and 11-membered cyclic transition states are shown experimentally and computationally to be more favorable than intermolecular cross-ligations.
已合成未保护的 O-酰化丝氨酸和 O-酰化苏氨酸异肽,并研究了它们通过 O 到 N 端转移转化为天然三肽和四肽的过程。实验和计算表明,涉及 8 元和 11 元循环过渡态的连接比分子间交叉连接更有利。