Results 21 to 30 of about 86,737 (136)

Stereoselectively fluorinated N-heterocycles: a brief survey

Beilstein Journal of Organic Chemistry, 2013
The stereoselective incorporation of fluorine atoms into N-heterocycles can lead to dramatic changes in the molecules’ physical and chemical properties.
Xiang-Guo Hu, Luke Hunter
doaj   +1 more source

Regioselective 1,4-trifluoromethylation of α,β-unsaturated ketones via a S-(trifluoromethyl)diphenylsulfonium salts/copper system

Beilstein Journal of Organic Chemistry, 2013
Regioselective conjugate 1,4-trifluoromethylation of α,β-unsaturated ketones by the use of shelf-stable electrophilic trifluoromethylating reagents, S-(trifluoromethyl)diphenylsulfonium salts and copper under mild conditions is described. A wide range of
Satoshi Okusu, Yutaka Sugita, Etsuko Tokunaga, Norio Shibata   +3 more
doaj   +1 more source

Enantioselective Benzylation and Allylation of α-Trifluoromethoxy Indanones under Phase-Transfer Catalysis

Molecules, 2019
The organo-catalyzed enantioselective benzylation reaction of α-trifluoromethoxy indanones afforded α-benzyl-α-trifluoromethoxy indanones with a tetrasubstituted stereogenic carbon center in excellent yield with moderate enantioselectivity
Yumeng Liang, Mayaka Maeno, Zhengyu Zhao, Norio Shibata   +3 more
doaj   +1 more source

Further Insight into Extractable (Organo)fluorine Mass Balance Analysis of Tap Water from Shanghai, China

Environmental Science & Technology, 2023
The ubiquitous occurrence of per- and polyfluoroalkyl substances (PFAS) and the detection of unexplained extractable organofluorine (EOF) in drinking water have raised growing concerns. A recent study reported the detection of inorganic fluorinated anions in German river systems, and therefore, in some samples, EOF may include some inorganic ...
Enmiao Jiao, Pontus Larsson, Qi Wang, Zhiliang Zhu, Daqiang Yin, Anna Kärrman, Patrick van Hees, Patrik Karlsson, Yanling Qiu, Leo W. Y. Yeung   +9 more
openaire   +2 more sources

Reduction of boron diffusion in silicon-germanium by fluorine implantation

, 2004
This paper investigates the effect of a 185 keV, 2.3×1015cm-2 F+ implant on boron thermal diffusion and boron transient enhanced diffusion (TED) in SiGe by characterising the diffusion of a boron marker layer in samples with and without a 288 keV, 6 ...
El Mubarek, H.A.W., Ashburn, P., El Mubarek, H. A W   +2 more
core   +2 more sources

Synthesis of enantiomerically pure (2S,3S)-5,5,5-trifluoroisoleucine and (2R,3S)-5,5,5-trifluoro-allo-isoleucine

Beilstein Journal of Organic Chemistry, 2013
A practical route for the stereoselective synthesis of (2S,3S)-5,5,5-trifluoroisoleucine (L-5-F3Ile) and (2R,3S)-5,5,5-trifluoro-allo-isoleucine (D-5-F3-allo-Ile) was developed.
Holger Erdbrink, Elisabeth K. Nyakatura, Susanne Huhmann, Ulla I. M. Gerling, Dieter Lentz, Beate Koksch, Constantin Czekelius   +6 more
doaj   +1 more source

Joy and Flustration with Organofluorine Compounds – A Fluorous Autobiography

CHIMIA, 2014
An overview is given about our work on fluoro-organic compounds, published or described in PhD theses between 1977 and 2013. After a discussion of structural F-effects and F-tagging applications the material is ordered by the various areas of ...
Dieter Seebach
doaj   +1 more source

The difluoromethylene (CF2) group in aliphatic chains: Synthesis and conformational preference of palmitic acids and nonadecane containing CF2 groups

Beilstein Journal of Organic Chemistry, 2014
The syntheses of palmitic acids and a nonadecane are reported with CF2 groups located 1,3 or 1,4 to each other along the aliphatic chain. Specifically 8,8,10,10- and 8,8,11,11-tetrafluorohexadecanoic acids (6b and 6c) are prepared as well as the singly ...
Yi Wang, Ricardo Callejo, Alexandra M. Z. Slawin, David O’Hagan   +3 more
doaj   +1 more source

Recent advances in transition metal-catalyzed Csp2-monofluoro-, difluoro-, perfluoromethylation and trifluoromethylthiolation

Beilstein Journal of Organic Chemistry, 2013
In the last few years, transition metal-mediated reactions have joined the toolbox of chemists working in the field of fluorination for Life-Science oriented research.
Grégory Landelle, Armen Panossian, Sergiy Pazenok, Jean-Pierre Vors, Frédéric R. Leroux   +4 more
doaj   +1 more source

N‐Boron‐Functionalized Anionic N‐Heterocyclic Carbenes (NBA‐NHCs)—A Case Study

Chemistry – A European Journal, EarlyView.
The synthesis and characterization of a new family of N‐boron‐functionalized anionic N‐heterocyclic carbenes (NBA‐NHCs), IiPrB(CN)3−, IiPr(C2F5)BF2−, IMesB(CN)3−, and IMes(C2F5)BF2−, is reported. ABSTRACT The synthesis and characterization of a new family of N‐boron‐functionalized anionic NHCs (NBA‐NHCs), IiPrB(CN)3− (5), IiPr(C2F5)BF2− (6), IMesB(CN)3−
Sophie Mann, Günther Horrer, Maik Finze, Udo Radius   +3 more
wiley   +1 more source