Structure–activity studies of non-steroid analogues structurally-related to neuroprotective estrogens
作者:Mingxing Qian、Elizabeth B. Engler-Chiurazzi、Sara E. Lewis、Nigam P. Rath、James W. Simpkins、Douglas F. Covey
DOI:10.1039/c6ob01726f
日期:——
for neuroprotective activity, phenolic compounds having the cyclopent[b]anthracene, cyclopenta[b]phenanthrene, benz[f]indene, benz[e]indene, indenes linked to a phenol, and a phenolic spiro ring system were prepared. New synthetic methods were developed to make some of the cyclopent[b]anthracene analogues as well as the spiro ring system. Compounds were evaluated for their ability to protect HT-22 hippocampal
雌酮和 17β-雌二醇是酚类类固醇,已知在多种神经元损伤模型中具有神经保护作用。先前的研究已经确定了其酚类类固醇 A 环对于神经保护的重要性,并确定了酚环 C-2 和 C-4 位置上的邻位取代基可以增强这种活性。为了研究类固醇环系统对神经保护活性的重要性,具有环戊[ b ]蒽、环戊[ b ]菲、苯[ f ]茚、苯[ e ]茚、与苯酚连接的茚和酚的酚类化合物制备了螺环系统。开发了新的合成方法来制造一些环戊[ b ]蒽类似物以及螺环系统。评估了化合物保护 HT-22 海马神经元免受谷氨酸神经毒性的能力,并确定了它们相对于 17β-雌二醇的有效神经保护类似物的活性。与酚羟基邻位的金刚烷基取代基在所有研究的环系统中均提供神经保护类似物。
The Efficient and Enantiospecific Total Synthesis of Cyclopenta[
<i>b</i>
]phenanthrenes Structurally‐Related to Neurosteroids
作者:Mingxing Qian、Douglas F. Covey
DOI:10.1002/adsc.201000370
日期:2010.10.9
functionalized at C-3 and C-8 from an optically pure Hajos-Parrish ketone. The key step is a neutral alumina catalyzed Michael addition of a Hajos-Parrish ketone derivative (4) to 1,7-octadien-3-one (2) in 98% yield. This Michael addition product went through Krapcho decarbomethoxylation, aldol condensation, lithiumliquidammoniareduction, Wacker oxidation and acid catalyzed cyclization to form cyclo