Synthesis of bis-γ-butyrolactones containing conformationally constrained ( S )- and ( R )-diacylglycerol structures
作者:Jeewoo Lee、Nancy E. Lewin、Peter M. Blumberg、Victor E. Marquez
DOI:10.1016/0968-0896(96)00116-2
日期:1996.8
The synthesis of two sets of rigid diacylglycerol (DAG) analogues with either the (S)-DAG or (R)-DAG enantiomer embedded into a bis-gamma-butyrolactone template was accomplished stereoselectively from di-O-isopropylidene-alpha-D-apiose. The key step in both syntheses was the assemblage of the bicyclic perhydrofuro[3,4-b]furan ring system via a radical exo-dig intramolecular cyclization. A lipophilic
从二-O-异亚丙基-α-D-立体选择性地合成了嵌入(双)-γ-丁内酯模板中的(S)-DAG或(R)-DAG对映异构体的两组刚性二酰基甘油(DAG)类似物。蜜蜂 两种合成过程中的关键步骤是通过自由基外切-分子内环化反应合成双环全氢呋喃[3,4-b]呋喃环系统。完全组装的全氢呋喃[3,4-b]呋喃-2,4-二酮(双-γ-丁内酯)模板的C-3上连接的亲脂十一烷基烷基链可以采用两种取向,其中一种取向远离凹面在每种情况下,双环系统的比率都以4:1的比例为佳。对作为PK-Cα配体的对映体的最终目标对的评估显示,包含嵌入式(R)-DAG结构的模板更有效。