作者:John M. Ndungu、James P. Cain、Peg Davis、Shou-W. Ma、Todd W. Vanderah、Josephine Lai、Frank Porreca、Victor J. Hruby
DOI:10.1016/j.tetlet.2006.01.096
日期:2006.3
In our ongoing research on the synthesis of constrained analogues of CCK/opioid chimeric peptides, a bicyclic dipeptide mimetic for Nle-Asp was designed and synthesized. Starting from beta-allyl substituted aspartic acids, the terminal double bond was oxidized resulting in spontaneous cyclization to form racemic hemiaminals. Allylation of the hemiaminals afforded 5-allyl substituted proline analogues
在我们正在进行的CCK /阿片类嵌合肽的约束类似物合成研究中,设计并合成了用于Nle-Asp的双环二肽模拟物。从β-烯丙基取代的天冬氨酸开始,末端双键被氧化,导致自发环化形成消旋的半缩醛。半胱胺的烯丙基化提供5-烯丙基取代的脯氨酸类似物,其经氧化,霍纳-埃蒙斯烯化,不对称氢化和双环化得到Nle-Asp的双环二肽模拟物。然后合成受约束的CCK /阿片肽类似物,其中包含针对Nle-Gly,Nle-Asp和homoPhe-Gly的双环二肽模拟物,并在CCK和阿片样物质受体上进行分析。