2-Benzoylpyridine Ligand Complexation with Gold Critical for Propargyl Ester-Based Protein Labeling
作者:Yixuan Lin、Kenward Vong、Koji Matsuoka、Katsunori Tanaka
DOI:10.1002/chem.201802058
日期:2018.7.25
reported work, AuIII complexes coordinated with 2‐benzoylpyridine ligand, BPy‐Au, were prebound to a protein and used to discover a novel protein‐directed labeling approach with propargyl ester functional groups. In this work, further examination discovered that gold catalysts devoid of the 2‐benzoylpyridine ligand (e.g., NaAuCl4) had significantly reduced levels of protein labeling. Mechanistic investigations
在先前报道的工作中,与2-苯甲酰基吡啶配体BPy-Au配位的Au III复合物预先结合到蛋白质上,并用于发现具有炔丙基酯官能团的新型蛋白质定向标记方法。在这项工作中,进一步的检查发现,不含2-苯甲酰基吡啶配体(例如NaAuCl4)的金催化剂的蛋白质标记水平显着降低。然后,机理研究表明,BPy-Au和炔丙基酯会经历C(sp 2)-C(sp)芳基-炔基交叉偶联,可能是通过自发的还原消除。总体而言,这些观察结果似乎表明,BPy-Au介导的基于炔丙基酯的蛋白质标记是通过活化的酯中间体起作用的,这有助于我们了解这一过程,并将有助于在未来的生物缀合中扩展/优化金催化剂的使用。应用,尤其是体内。