Systematic Study of the Synthesis of Macrocyclic Dipeptide β-Turn Mimics Possessing 8-, 9-, and 10- Membered Rings by Ring-Closing Metathesis
作者:Ramesh Kaul、Simon Surprenant、William D. Lubell
DOI:10.1021/jo0477648
日期:2005.5.1
A systematic study was performed to establish general synthesis protocols for forming enantiomerically pure macrocyclic dipeptide lactams. Focusing on macrocycles of 8-, 9-, and 10-membered rings, effective syntheses were achieved by a sequence featuring peptide coupling of allyl- and homoallyl-glycine building blocks followed by ring-closing metathesis. The 8-membered lactam-possessing cis-amide and
进行了系统的研究以建立用于形成对映体纯的大环二肽内酰胺的一般合成方案。着眼于8、9和10元环的大环,有效的合成是通过一个序列进行的,该序列的特征是将烯丙基-和高烯丙基-甘氨酸的结构单元进行肽偶联,然后进行闭环复分解。通过使用各自保护的二肽的一般策略,有效地制备了具有顺式酰胺和顺式烯烃构型的8元内酰胺以及具有反酰胺和反烯烃构型的9元和10元内酰胺。格拉布斯的催化剂,以及作为苄基衍生物的中央酰胺的临时保护。