Total synthesis of cycloisodityrosine, RA-VII, deoxybouvardin, and N29-desmethyl-RA-VII: Identification of the pharmacophore and reversal of the subunit functional roles
作者:Dale L. Boger、Daniel Yohannes、Jiacheng Zhou、Michael A. Patane
DOI:10.1021/ja00062a004
日期:1993.5
Full details of a concise total synthesis of RA-VII (1) and deoxybouvardin (2) are described based on the implementation of an effective intramolecular Ullmann reaction as the key macrocyclization reaction in the preparation of the elusive 14-membered cycloisodityrosine subunit (33) of the bicyclic hexapeptides. Subsequent coupling of 34 to tetrapeptide 17 and macrocyclization with C 2 -N 3 amide bond
基于有效的分子内 Ullmann 反应作为制备难以捉摸的 14 元环异二酪氨酸亚基 (33) 的关键大环化反应的实施,描述了 RA-VII (1) 和脱氧布瓦丁 (2) 的简明全合成的全部细节的双环六肽。随后 34 与四肽 17 偶联以及大环化与 C 2 -N 3 酰胺键形成提供了 1 和 2。在解决有助于其抗肿瘤活性的药物的关键结构和构象特征的努力中,N 29 -去甲基-RA-制备了 VII 并详细说明了其化学、构象和初步生物学特性