Results 31 to 40 of about 924 (142)

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

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

Recent Advances of Perovskite Oxides for Air Pollution Control Chemistry: The Closed Loop From Design to Application

EcoEnergy, EarlyView.
This review summarizes a descriptor‐guided framework for linking theoretical calculations, in situ/operando characterization, synthesis regulation, and application screening in functional materials. Emphasis is placed on dynamic structure–property relationships that enable low‐cost material design with enhanced activity, stability, and environmental ...
Yanyu Jin, Zezheng Tang, Hengfan Wu, Xing Yuan, Zongxiang Yang, Weijia An, Wenquan Cui, Xianguang Meng, Ying Xu, Junhua Li   +9 more
wiley   +1 more source

Multigramme synthesis and asymmetric dihydroxylation of a 4-fluorobut-2E-enoate

Beilstein Journal of Organic Chemistry, 2013
Esters of crotonic acid were brominated on a multigramme scale using a free radical procedure. A phase transfer catalysed fluorination transformed these species to the 4-fluorobut-2E-enoates reproducibly and at scale (48–53%, ca. 300 mmol).
James A. B. Laurenson, John A. Parkinson, Jonathan M. Percy, Giuseppe Rinaudo, Ricard Roig   +4 more
doaj   +1 more source

Electroconductive MXene‐Thin‐Film‐Composite Membranes for Coupled Osmotic Concentration and PFAS Mineralization

Small, EarlyView.
An electroconductive MXene‐TFC membrane integrates osmotic dewatering with anodic oxidation to concentrate and mineralize PFOA at the membrane interface. The coupled AO‐PRO configuration accelerates degradation kinetics, achieves 99% rejection and up to 93% TOC removal, and lowers specific energy demand, offering a compact route for PFAS destruction ...
Afrouz Yousefi, Pooria Karami, Vahid Rad, Amir Aghaei, Mojtaba Mohseni, Lingling Yang, Masoud Soroush, Matthias Wessling, Mohamed Gamal El‐Din, Mohtada Sadrzadeh   +9 more
wiley   +1 more source