A novel general method for preparation of α-fluoro-α-arylcarboxylic acid. Direct fluorination of silyl ketene acetals with Selectfluor®
作者:Fei Zhang、Jake Z. Song
DOI:10.1016/j.tetlet.2006.08.057
日期:2006.10
The reaction of an α-arylcarboxylic acid with TBSCl and LiHMDS in THF yielded bis-silyl ketene acetal, which was directly fluorinated with inexpensive Selectfluor® to produce the corresponding α-fluoro-α-arylcarboxylic acid in high yield. Application of the methodology to the synthesis of α-fluorocarboxylic ester from the corresponding carboxylic ester is also described.
This study aimed to develop novel rapid-acting antidepressants with sustained efficacy and favorable safety profiles. We designed and synthesized a series of fluorine-containing scopolamine analogues and evaluated their antidepressant potential. In vitro cytotoxicity assays showed that most of these compounds exhibited minimal toxicity against neuronal and non-neuronal mammalian cell lines (IC50 >
本研究旨在开发具有持续疗效和良好安全性的新型速效抗抑郁药。我们设计并合成了一系列含氟东莨菪碱类似物,并评估了它们的抗抑郁潜力。体外细胞毒性测定表明,大多数这些化合物对神经元和非神经元哺乳动物细胞系表现出最小的毒性(IC 50 > 100 μM)。采用悬尾试验评价化合物的抗抑郁活性,确定S -3a为具有强效、持续抗抑郁作用的先导化合物。在行为上, S -3a减轻了小鼠的抑郁症状,并表现出比东莨菪碱更高的认知安全裕度。毒理学评估证实了S -3a的安全性,而药代动力学显示其清除速度很快(半衰期:16.6 分钟)。从机制上讲, S -3a拮抗 M 1受体并升高 BDNF 水平,表明其作为抗抑郁药的潜力有待进一步探索。