申请人:University of Virginia Patent Foundation
公开号:US06080838A1
公开(公告)日:2000-06-27
A peptidomimetic of the turn in the helix-turn-helix (HTH) motif of DNA-binding proteins was designed and synthesized. Conformational constraint was achieved by an unusual linking of two amino acids with a side-chain carbon--carbon bond. A phenyl ring provides the potential for new hydrophobic contacts with the hydrophobic core of the HTH motif. In the mimic, the peptide backbone and the central residue were retained in native form within a 12-membered cyclic tripeptide. The target compound 1b was synthesized by two sequential Horner-Wittig couplings followed by enantioselective hydrogenation with Rh(MeDuPHOS) in 8 steps and 35% overall yield. The stereochemical outcome of the key hydrogenation was determined by aromatic ring oxidation with RuO.sub.2 /NalO.sub.4 to give two equivalents of Boc-Asp-OMe.
DNA结合蛋白的螺旋-转角-螺旋(HTH)结构的一种肽类类似物被设计并合成。通过将两个氨基酸通过侧链碳-碳键连接实现构象约束。苯环提供了与HTH结构的疏水核心形成新疏水接触的潜力。在模拟物中,肽骨架和中心残基在一个12环三肽内保持原生形式。目标化合物1b通过两步顺序的Horner-Wittig偶联,然后在8步和35%的总产率下使用Rh(MeDuPHOS)进行对映选择性氢化合成。关键氢化的立体化学结果通过RuO.sub.2 /NalO.sub.4的芳香环氧化确定,生成两当量的Boc-Asp-OMe。