作者:Brian J. Groendyke、Deyaa I. AbuSalim、Silas P. Cook
DOI:10.1021/jacs.6b08171
日期:2016.10.5
This communication describes a mild, amide-directed fluorination of benzylic, allylic, and unactivated C-H bonds mediated by iron. Upon exposure to a catalytic amount of iron(II) triflate (Fe(OTf)2), N-fluoro-2-methylbenzamides undergo chemoselective fluorine transfer to provide the corresponding fluorides in high yield. The reaction demonstrates broad substrate scope and functional group tolerance
该通讯描述了由铁介导的苄基、烯丙基和未活化的 CH 键的温和、酰胺导向氟化。在接触催化量的三氟甲磺酸铁 (II) (Fe(OTf)2) 后,N-氟-2-甲基苯甲酰胺进行化学选择性氟转移,以高产率提供相应的氟化物。该反应显示出广泛的底物范围和官能团耐受性,无需使用任何贵金属添加剂。机理和计算实验表明,反应通过短寿命的自由基中间体进行,F-转移直接由铁介导。
The γ C–H amination of carboxylic acid presents a promising and sustainable strategy for synthesizing high-value pharmaceutical chemicals. Radical reaction pathways initiated by aroyloxy radical-involved hydrogen atom transfer (HAT) provide diverse but challenging opportunities for remote C–H functionalization. In this report, the first example of intramolecular γ C–H amination of carboxylic acids
Experiments in the Colchicine Field. V. The Thermal and Photochemical Decomposition of Various 2-(β-Phenylethyl)-phenyldiazomethanes and 2-(γ-Phenylpropyl)-phenyldiazomethanes<sup>1</sup>
作者:C. David Gutsche、Emil F. Jason、Robert S. Coffey、Herbert E. Johnson
DOI:10.1021/ja01554a043
日期:1958.11
4-Aminoquinolines: Novel Nociceptin Antagonists with Analgesic Activity
Small-molecule nociceptin antagonists were synthesized to examine their therapeutic potential. After a 4-aminoquinoline derivative was found to bind with the human ORL1 receptor, a series of 4-aminoquinolines and related compounds were synthesized and their binding was evaluated. Elucidation of structure-activity relationships eventually led to the optimum compounds. One of the se compounds, N-(4-amino-2-methylquinolin-6-yl) -2-(4-ethylphenoxymethyl)benzamide hydrochloride (11) not only antagonized nociceptin-induced allodynia in mice but also showed analgesic effect in a hot plate test using mice and in a formalin test using rats. Its analgesic effect was not antagonized by the opioid antagonist naloxone. These results indicate that this nociceptin antagonist has the potential to become a novel type of analgesic that differs from mu -opioid agonists.
The Influence of Steric Configuration on the Ultraviolet Absorption of “Fixed” Benzils<sup>1,2</sup>
作者:Nelson J. Leonard、A. Jerry Kresge、Michinori Ōki