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    • 8. 发明授权
    • Peptidomimetic of helix-turn-helix or gamma-turn
    • 螺旋转旋螺旋或γ-转弯的拟肽
    • US6080838A
    • 2000-06-27
    • US978023
    • 1997-11-25
    • Felicia A. EtzkornJeremy M. Travins
    • Felicia A. EtzkornJeremy M. Travins
    • C07K5/097C07K14/47A61K38/00
    • C07K14/4702C07K5/0821
    • 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.
    • 设计并合成了DNA结合蛋白的螺旋 - 转旋螺旋(HTH)基序的转录的拟肽。 通过两个氨基酸与侧链碳 - 碳键的异常连接实现构象约束。 苯环提供与HTH基序的疏水核心的新的疏水接触的潜力。 在模拟物中,肽骨架和中心残基以天然形式保留在12-元环状三肽内。 目标化合物1b通过两个顺序的Horner-Wittig偶联合成,然后用Rh(MeDuPHOS)以8步的对映选择性氢化和35%的总收率合成。 通过RuO2 / NalO4的芳环氧化测定关键氢化的立体化学结果,得到两当量的Boc-Asp-OMe。