Conformationally Constrained Analogues of Diacylglycerol. 11. Ultrapotent Protein Kinase C Ligands Based on a Chiral 5-Disubstituted Tetrahydro-2-furanone Template
作者:Jeewoo Lee、Shaomeng Wang、George W. A. Milne、Rajiv Sharma、Nancy E. Lewin、Peter M. Blumberg、Victor E. Marquez
DOI:10.1021/jm950277n
日期:1996.1.1
of PK-C with DAG is stereospecific, it was anticipated that PK-C would bind tightly to only one enantiomeric form of the compounds constructed with this new lactone template. Separation of enantiomers by chiral HPLC was discarded due to the ease with which acyl migration occurs in these class of compounds, and a total chiral synthesis was undertaken. Prior to chemical synthesis, the selection of the
以前显示在外消旋5(-)[((酰氧基)-甲基] -5-(羟甲基)四氢-2-呋喃酮)模板上构象受限的二酰基甘油(DAG)类似物具有出色的结合蛋白激酶C(PK- C)。由于PK-C与DAG的相互作用是立体特异性的,因此可以预期,PK-C仅与该新内酯模板构建的化合物的仅一种对映体形式紧密结合。由于在这类化合物中容易发生酰基迁移,因此放弃了通过手性HPLC分离对映体的方法,并进行了总的手性合成。在化学合成之前,通过分子构象分析预测了“正确的”对映体模板的选择,该构象分析将DAG的两种对映体的假定“活性”进行了比较。两个对映体内酯模板的构象。DAG的这种“活性”构象源自先前开发的药效团模型,该模型使用强力佛波二酯分子作为理想的刚性模板。该分析的结果表明“正确的”内酯模板对应于DAG的非活性(R)-异构体。该分析还预测对应于活性(S)-DAG对映异构体的内酯模板不能充分地适合药效基团。从共同的双环中间体(5R,8R,9R)-8