Nucleophilic (Radio)Fluorination of α-Diazocarbonyl Compounds Enabled by Copper-Catalyzed H–F Insertion
作者:Erin E. Gray、Matthew K. Nielsen、Kimberly A. Choquette、Julia A. Kalow、Thomas J. A. Graham、Abigail G. Doyle
DOI:10.1021/jacs.6b06770
日期:2016.8.31
The copper-catalyzed H-F insertion into α-diazocarbonyl compounds is described using potassium fluoride (KF) and hexafluoroisopropanol. Access to complex α-fluorocarbonyl derivatives is achieved under mild conditions, and the method is readily adapted to radiofluorination with [(18)F]KF. This late-stage strategy provides an attractive route to (18)F-labeled biomolecules.
We herein describe a new method for nucleophilic fluorine substitution of alkylbromides using Et3N·3HF. The process is characterized by a broad substrate scope, good functional-group compatibility, and mild conditions and provides a variety of alkylfluorides including tertiary alkylfluorides that are versatile and structurally attractive.
我们在此描述了一种使用 Et 3 N·3HF 亲核氟取代烷基溴的新方法。该工艺具有底物范围广、官能团相容性好、条件温和等特点,可提供多种烷基氟化物,包括叔烷基氟化物,用途广泛且结构有吸引力。
H–F bond insertions into α-diazo carbonyl compounds
作者:Laiéli S. Munaretto、Rafael D. C. Gallo、Luiz Paulo M. O. Leão、Igor D. Jurberg
DOI:10.1039/d2ob00400c
日期:——
A reaction for H–F bond insertion into α-diazo carbonylcompounds is reported. The protocol describes a simple reaction setup employing commercially available HF·pyr (Olah reagent) as the fluorine source. The method is rapid and practical, and allows access to a broad range of α-fluorinated carbonylcompounds in generally good yields.
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。