申请人:Merck Patent Gesellschaft mit beschrankter Haftung
公开号:US05045229A1
公开(公告)日:1991-09-03
Difluoromethylene compounds of the formula I R.sup.1 --(A.sup.1 --Z.sup.1).sub.m --A.sup.2 --Q--CF.sub.2 --(A.sup.3 --Z.sup.2).sub.n --A.sup.4 --R.sup.2 I in which R.sup.1, R.sup.2, A.sup.1, A.sup.2, A.sup.3, A.sup.4, Z.sup.1, Z.sup.2, m and n are as defined herein and Q is --CO--, --O-- or --S--, can be used as components of liquid-crystalline media for liquid-crystal and electrooptical display elements.
Generation of Axially Chiral Fluoroallenes through a Copper-Catalyzed Enantioselective β-Fluoride Elimination
作者:Thomas J. O’Connor、Binh Khanh Mai、Jordan Nafie、Peng Liu、F. Dean Toste
DOI:10.1021/jacs.1c05769
日期:2021.9.1
difluorides to generate axiallychiral, tetrasubstituted monofluoroallenes in both good yields (27 examples >80%) and enantioselectivities (82–98% ee). Compared to previously reported synthetic routes to axiallychiralallenes (ACAs) from prochiral substrates, a mechanistically distinct reaction has been developed: the enantiodiscrimination between enantiotopic fluorides to set an axial stereocenter. DFT
0.5 nM and excellent selectivity (>4000-fold) over the CB1 receptor. The size of the substituent on the 2-position determined the level of agonism, ranging from inverseagonism to partial agonism to full agonism, which was more pronounced for the rat CB2 receptor. A wide variation of sulfonyl substituents at the benzimidazole 5-position was tolerated, which was used to optimize the drug-like properties
Bromodifluoromethylation of aromatic Grignard reagents with CF2Br2
作者:Masahiro Shiosaki、Munenori Inoue
DOI:10.1016/j.tetlet.2014.10.082
日期:2014.12
The bromodifluoromethylation of aromaticGrignardreagents having electron-withdrawing groups with dibromodifluoromethane (CF2Br2) was developed. The reaction proceeded to give the corresponding (bromodifluoromethyl)benzene derivatives via a difluorocarbene-mediated mechanism.
[EN] FLUORINATION PROCESS<br/>[FR] PROCÉDÉ DE FLUORATION
申请人:UNIV OXFORD INNOVATION LTD
公开号:WO2016151295A1
公开(公告)日:2016-09-29
The present invention relates to a process for producing an organic compound comprising an 18F atom, which process comprises treating a precursor organic compound comprising a –CY2X group with: (i) [18F] fluoride; and (ii) an activator which comprises a compound comprising silver, gold, copper or platinum, or which comprises elemental silver, gold, copper or platinum wherein: X is a leaving group; and each Y is independently selected from F, Cl, Br and H. Also described is the use of an activator which comprises a compound comprising silver, gold, copper or platinum, or which comprises elemental silver, gold, copper or platinum, in a process for producing an organic compound comprising an F atom according to the invention. A kit, composition and compound are also described.