- Alkali Metal Fluorides in Fluorinated Alcohols: Fundamental Properties and Applications to Electrochemical Fluorination
-
Fundamental properties of alkali metal fluorides (MF, M = Cs, K) dissolved in 1,1,1,3,3,3-hexafluoroisopropanol (HFIP) or in 3,3,3-trifluoroethanol (TFE) are investigated, including solubility, conductivity, and viscosity. Solid-state structures of single crystals obtained from CsF/HFIP and CsF/TFE are described for the first time, giving insights into the multiple interactions between fluorinated alcohols and CsF. Applications in electrochemical fluorination reactions are successfully demonstrated.
- Shida, Naoki,Takenaka, Hiroaki,Gotou, Akihiro,Isogai, Tomohiro,Yamauchi, Akiyoshi,Kishikawa, Yosuke,Nagata, Yuuya,Tomita, Ikuyoshi,Fuchigami, Toshio,Inagi, Shinsuke
-
p. 16128 - 16133
(2021/07/26)
-
- Visible-light photoredox-catalyzed selective carboxylation of C(sp3)?F bonds with CO2
-
It is highly attractive and challenging to utilize carbon dioxide (CO2), because of its inertness, as a nontoxic and sustainable C1 source in the synthesis of valuable compounds. Here, we report a novel selective carboxylation of C(sp3)?F bonds with CO2 via visible-light photoredox catalysis. A variety of mono-, di-, and trifluoroalkylarenes as well as α,α-difluorocarboxylic esters and amides undergo such reactions to give important aryl acetic acids and α-fluorocarboxylic acids, including several drugs and analogs, under mild conditions. Notably, mechanistic studies and DFT calculations demonstrate the dual role of CO2 as an electron carrier and electrophile during this transformation. The fluorinated substrates would undergo single-electron reduction by electron-rich CO2 radical anions, which are generated in situ from CO2 via sequential hydride-transfer reduction and hydrogen-atom-transfer processes. We anticipate our finding to be a starting point for more challenging CO2 utilization with inert substrates, including lignin and other biomass.
- Bo, Zhi-Yu,Chen, Lin,Gao, Tian-Yu,Jing, Ke,Lan, Yu,Liu, Shi-Han,Luo, Shu-Ping,Yan, Si-Shun,Yu, Bo,Yu, Da-Gang
-
supporting information
p. 3099 - 3113
(2021/11/16)
-
- Pd-Catalyzed Transfer of Difluorocarbene for Three Component Cross-Coupling?
-
Outstanding accomplishments have been achieved in the chemistry of difluorocarbene, but transition- metal-catalyzed transfer of difluorocarbene for coupling remains a challenging task. Herein, we describe a Pd-catalyzed coupling of difluorocarbene with two aryl carbon centers to give difluoromethylenation products, which cannot be obtained by any previous difluorocarbene-transformation method.
- Xu, Zhi-Wei,Zhang, Wei,Lin, Jin-Hong,Jin, Chuan-Ming,Xiao, Ji-Chang
-
supporting information
p. 1647 - 1650
(2020/10/19)
-
- Stoichiometric Studies on the Carbonylative Trifluoromethylation of Aryl Pd(II) Complexes using TMSCF3 as the Trifluoromethyl Source
-
We have performed a series of stoichiometric studies in order to identify viable steps for a hypothetical catalytic cycle for the palladium-mediated carbonylative coupling of an aryl bromide with TMSCF3. Our work revealed that benzoyl Pd(II) complexes bearing Xantphos or tBu3P as the phosphine ligands, which are generated from the corresponding PdII(Ph)Br complexes exposed to stoichiometric 13CO from 13COgen, were unable to undergo transmetalation and reductive elimination to trifluoroacetophenone. Instead, in the presence of base and additional CO, these organometallic complexes readily underwent reductive elimination to the acid fluoride. Attempts to determine whether the acid fluoride could represent an intermediate for acetophenone production were unrewarding. Only in the presence of a boronic ester did we observe some formation of the desired product, although the efficiency of transformation was still low. Finally, we investigated the reactivity of four phosphine-ligated PdII(Ph)CF3 complexes (Xantphos, DtBPF, tBu3P, and triphenylphosphine) with carbon monoxide. With the exception of the tBu3P-ligated complex, all other metal complexes led to the facile formation of trifluoroacetophenone. We also determined in the case of triphenylphosphine that CO insertion occurred into the Pd-Ar bond, as trapping of this complex with n-hexylamine led to the formation of n-hexylbenzamide.
- Daasbjerg, Kim,Domino, Katrine,Johansen, Martin B.,Skrydstrup, Troels
-
supporting information
(2020/03/04)
-
- DIFLUOROMETHYL AND DIFLUOROMETHYLENE TRANSFER REAGENTS
-
Disclosed herein are borazine, borate, and azaborinine compounds and compositions, methods of making said compounds and compositions, and methods of forming aromatic difluorocarbon compounds and difluorocarbon compounds.
- -
-
Paragraph 0022; 0096
(2020/01/22)
-
- The Difluoromethyl Group as a Masked Nucleophile: A Lewis Acid/Base Approach
-
The difluoromethyl group (R-CF2H) imparts desirable pharmacokinetic properties to drug molecules and is commonly targeted as a terminal functional group that is not amenable to further modification. Deprotonation of widely available Ar-CF2
- Geri, Jacob B.,Wade Wolfe, Michael M.,Szymczak, Nathaniel K.
-
p. 9404 - 9408
(2018/08/09)
-
- Activation of SF6 at Platinum Complexes: Formation of SF3 Derivatives and Their Application in Deoxyfluorination Reactions
-
The activation of SF6 at [Pt(PR3)2] R=Cy, iPr complexes in the presence of PR3 led selectively and in an unprecedented reaction route to the generation of the SF3 complexes trans-[Pt(F)(SF3)(PR3)2]. These can also be synthesized from SF4 and the SF2 derivative trans-[Pt(F)(SF2)(PCy3)2][BF4] was characterized by X-ray crystallography. trans-[Pt(F)(SF3)(PR3)2] complexes are useful tools for deoxyfluorination reactions and novel fluorido complexes bearing a SOF ligand are formed. Based on these studies a process for the deoxyfluorination of ketones was developed with SF6 as fluorinating agent.
- Berg, Claudia,Braun, Thomas,Ahrens, Mike,Wittwer, Philipp,Herrmann, Roy
-
supporting information
p. 4300 - 4304
(2017/04/04)
-
- Stoichiometric and Catalytic Aryl-Perfluoroalkyl Coupling at Tri-tert-butylphosphine Palladium(II) Complexes
-
This Communication describes studies of Ph-RF (RF = CF3 or CF2CF3) coupling at Pd complexes of general structure (PtBu3)PdII(Ph)(RF). The CF3 analogue participates in fast Ph-CF3 coupling (II complex. Furthermore, they show that this undesired pathway can be circumvented by changing from a CF3 to a CF2CF3 ligand. Ultimately, the insights gained from stoichiometric studies enabled the identification of Pd(PtBu3)2 as a catalyst for the Pd-catalyzed cross-coupling of aryl bromides with TMSCF2CF3 to afford pentafluoroethylated arenes.
- Ferguson, Devin M.,Bour, James R.,Canty, Allan J.,Kampf, Jeff W.,Sanford, Melanie S.
-
supporting information
p. 11662 - 11665
(2017/09/07)
-
- FLUORINATING AGENT
-
An object of the present invention is to provide a novel substance that has a high reactivity as a fluorinating agent, is effectively used in various fluorination reactions, and is safely handled even in air. As the solution for achieving this object, the present invention provides a complex obtained by reacting bromine trifluoride with at least one metal halide selected from the group consisting of halogenated metals and halogenated hydrogen metals in a nonpolar solvent. This complex serves as a fluorinating agent that provides excellent fluorination performance and that is stable in air.
- -
-
Paragraph 0092; 0099
(2016/12/01)
-
- (Re)Investigation of the reactivity of uranium hexafluoride toward several organic functions at room temperature
-
The annual worldwide production of UF6 is very large and this compound is not used. Consequently, it could be interesting to find some applications as organic reagent. UF6 could be considered as an oxidizer of various functions. However, it seems also present some possibilities as a fluorinating reagent in mild conditions.
- Roy, Olivier,Marquet, Bernard,Alric, Jean-Paul,Jourdan, Alex,Morel, Bertrand,Langlois, Bernard R.,Billard, Thierry
-
-
- Electrochemical fluorination using halogen mediators in ionic liquid hydrogen fluoride salt
-
In order to utilize ammomium halides (Et4NX, X=Cl, Br, I) as halogenmediator for electrocatalytic fluorination, cyclic voltammetry measurements of the halides were investigated. The catalytic current of the halides in the presence of a dithioacatal compound was observed and the macro-scale electrolysis of dithioacetals using the halogen mediator was also carried out in ionic liquid hydrogen fluoride (HF) salt to give the corresponding fluorinated products in excellent yields. The recycle use of the halogen mediator in the electrochemical fluorination was successfully demonstrated. More inexpensive halides such as potassium bromide and potassium iodide could be soluble in HF salt and worked well as halogen mediator for the electrocatalytic fluorination.
- Takahashi, Kohta,Inagi, Shinsuke,Fuchigami, Toshio
-
p. G3046-G3052
(2013/07/05)
-
- Visible light-promoted metal-free C-H activation: Diarylketone-catalyzed selective benzylic mono- and difluorination
-
We report herein an operationally simple method for the direct conversion of benzylic C-H groups to C-F. We show that visible light can activate diarylketones to abstract a benzylic hydrogen atom selectively. Adding a fluorine radical donor yields the benzylic fluoride and regenerates the catalyst. The selective formation of mono- and difluorination products can be achieved by catalyst control. 9-Fluorenone catalyzes benzylic C-H monofluorination, while xanthone catalyzes benzylic C-H difluorination. The scope and efficiency of this new C-H fluorination method are significantly better than those of the existing methods. This is also the first report of selective C-H gem-difluorination.
- Xia, Ji-Bao,Zhu, Chen,Chen, Chuo
-
supporting information
p. 17494 - 17500
(2014/01/06)
-
- Arylsulfur chlorotetrafluorides as useful fluorinating agents: Deoxo- and dethioxo-fluorinations
-
Usage of arylsulfur chlorotetrafluorides 1 as versatile deoxo- and dethioxo-fluorinating agents is described. There have been developed two convenient methods for the in situ preparation of reactive arylsulfur trifluorides 2 from 1. The one is reduction of 1 with a reducer such as pyridine to 2, and the other is disproportionation of 1 with a diaryl disulfide to 2 with evolution of chlorine gas. The latter method is a convenient way to get neat 2 from 1. The in situ prepared 2 fluorinates many kinds of substrates such as alcohols, aldehydes, ketones, diketones, and carboxylic acids to give the corresponding CF, CF2, CF2CF2, and CF 3 compounds in high yields. 2 also fluorinates various sulfur compounds including CS groups to give CF2, OCF2, CF 3, and OCF3 compounds in high yields. Reactions of 2 with diols or bis(trimethylsilyl) derivatives of diols or amino alcohols provided the corresponding deoxofluoro-arylsulfinylation products in high yields. In addition, it has been found that chlorotetrafluorides 1 directly and effectively react with the sulfur compounds to give the corresponding fluoro compounds in high yields. Since they are the intermediates for the production of industrially useful arylsulfur pentafluorides, arylsulfur chlorotetrafluorides 1, in particular, phenylsulfur chlorotetrafluoride (1a) are expected to find use as inexpensive and versatile deoxo- and dethioxo-fluorinating agents for the preparation of many organofluoro compounds.
- Umemoto, Teruo,Singh, Rajendra P.
-
experimental part
p. 17 - 27
(2012/09/07)
-
- Pyridine?BrF3, the missing link for clean fluorinations of aromatic derivatives
-
This work demonstrates the unique features of the never used before Py?BrF3 complex in the field of aromatic organic fluorinations. The main disadvantage of the noncomplexed BrF3 is the fact that usually, in addition to the desired fluorination, a parallel electrophilic aromatic bromination takes place as well. Use of the Py?BrF3 complex reduces this electrophilic bromination, which is observed with most reagents based on fluorine and bromine [BrF].
- Hagooly, Youlia,Rozen, Shlomo
-
supporting information; experimental part
p. 1114 - 1117
(2012/04/10)
-
- Development of triarylamine mediator having ionic-tag and its application to electrocatalytic reaction in ionic liquid
-
Novel triarylamine (Ar3N) mediators bearing an ionic-tag moiety were synthesized from 4,4′-dibromotriphenylamine. Their electrochemical properties were investigated by cyclic voltammetry both in organic solvent and ionic liquid HF salt. The electrocatalytic reactions such as deprotection and fluorodesulfurization of dithioacetals were successfully carried out using these Ar3N mediators in an undivided cell at room temperature.
- Takahashi, Kohta,Furusawa, Takashi,Sawamura, Takahiro,Kuribayashi, Shunsuke,Inagi, Shinsuke,Fuchigami, Toshio
-
experimental part
p. 47 - 53
(2012/10/18)
-
- IF5-pyridine-HF: Air- and moisture-stable fluorination reagent
-
IF5-pyridine-HF, an air- and moisture-stable solid, can be used as a fluorination reagent for the introduction of fluorine atoms to the α-position of the sulfur atom in sulfides. The desulfurizing-fluorination reactions of benzylic sulfides, thioacetals, and 2-(methylthio)-1,3-dithiane derivatives were also performed using this reagent.
- Hara, Shoji,Monoi, Miki,Umemura, Ryosuke,Fuse, Chiaki
-
p. 10145 - 10150,6
(2020/09/02)
-
- Recyclable polymer-supported iodobenzene-mediated electrocatalytic fluorination in ionic liquid
-
The electrochemical fluorination of organosulfur compounds in triethylamine/hydrofluoric acid (Et3N-5HF) with polystyrene-supported iodobenzene (PSIB) and tetraethylammonium chloride (Et4NCl) was performed successfully in an undivided cell under constant current conditions to afford the corresponding fluorinated compounds in moderate to good yields. Recycle use of the PSIB could be achieved due to its easy separation. Notably, the mediatory activity of the iodobenzene derivative was not appreciably changed even after 10 recycle uses.
- Sawamura, Takahiro,Kuribayashi, Shunsuke,Inagi, Shinsuke,Fuchigami, Toshio
-
experimental part
p. 2757 - 2760
(2010/12/25)
-
- Use of Task-Specific Ionic liquid for selective electrocatalytic fluorination
-
[Chemical equation presented] Highly selective indirect anodic fluorination of organic compounds was successfully carried out for the first time by using a task-specific ionic liquid of iodoarene as a mediator in ionic liquid hydrogen fluoride salts.
- Sawamura, Takahiro,Kuribayashi, Shunsuke,Lnagi, Shinsuke,Fuchigami, Toshio
-
supporting information; experimental part
p. 644 - 646
(2010/07/03)
-
- FLUORINATION PROCESSES WITH ARYLSULFUR HALOTETRAFLUORIDES
-
New fluorination processes for introducing one or more fluorine atoms into target substrate compounds with arylsulfur halotetrafluorides are disclosed. Also disclosed are methods for preparation of arylsulfur trifluorides.
- -
-
Page/Page column 41; 43
(2009/10/22)
-
- METHODS AND COMPOSITIONS FOR PRODUCING DIFLUOROMETHYLENE-AND TRIFLUOROMETHYL-CONTAINING COMPOUNDS
-
New methods for producing difluoromethylene-containing compounds with phenylsulfur trifluoride or a primary alkyl-substituted phenylsulfur trifluoride are disclosed. Also, new methods for producing trifluoromethyl-containing compounds with phenylsulfur trifluoride or primary alkyl-substituted phenylsulfur trifluoride are also disclosed.
- -
-
Page/Page column 28
(2009/07/17)
-
- Direct nucleophilic fluorination of carbonyl groups of benzophenones and benzils with Deoxofluor
-
The carbonyl groups of diaryl ketones and diaryl diketones were directly fluorinated with bis(2-methoxyethyl)aminosulfur trifluoride (Deoxofluor) under neat conditions to give the corresponding gem-difluorides and tetrafluorinated derivatives in moderate
- Chang, Ying,Tewari, Amit,Adi, Avi-Izak,Bae, Chulsung
-
p. 9837 - 9842
(2008/12/22)
-
- gem-Difluorination of 2,2-diaryl-1,3-dithiolanes by Selectfluor and pyridinium polyhydrogen fluoride
-
2,2-Diaryl-1,3-dithiolanes, readily obtainable from diaryl ketones, were transformed into the corresponding gem-difluoro compounds using a novel reagent combination involving Selectfluor and pyridinium polyhydrogen fluoride (PPHF) under mild conditions in moderate to good yields. The Royal Society of Chemistry 2005.
- Reddy, V. Prakash,Alleti, Ramesh,Perambuduru, Meher K.,Welz-Biermann, Urs,Buchholz, Herwig,Prakash, G. K. Surya
-
p. 654 - 656
(2007/10/03)
-
- Process for the production of fluorinated organic compounds and fluorinating agents
-
A process for the production of a fluorinated organic compound, characterized by fluorinating an organic compound having a hydrogen atoms using IF5; and a novel fluorination process for fluorinating an organic compound having a hydrogen atoms by using a fluorinating agent containing IF5 and at least one member selected from the group consisting of acids, bases, salts and additives.
- -
-
-
- Bromine-containing 1,2-bis(phenyl)difluoromethanes and method of imparting flame retardancy to flammable materials
-
Bromine containing 1,2-bis(phenyl)difluoromethane derivatives, a method for their preparation and their use in flame retardant compositions.
- -
-
Page column 23-24
(2008/06/13)
-
- Novel fluorination reagent: IF5/Et3N-3HF
-
IF5 in Et3N-3HF was found to be a stable, non-hazardous, easy to handle, and inexpensive reagent that enables effective and selective fluorination of organic compounds under mild conditions.
- Yoneda, Norihiko,Fukuhara, Tsuyoshi
-
p. 222 - 223
(2007/10/03)
-
- Fluorination of thiocarbon compounds with bis(2-methoxyethyl)aminosulfur trifluoride (deoxo-fluor reagent): A facile synthesis of gem-difluorides
-
A variety of thiocarbonyl derivatives (thioketone, thioester, thioamide, dithioester, and dithiocarbamate) were converted to the corresponding gem-difluorides in excellent yields on reaction with the fluorinating agent, bis(2-methoxyethyl)aminosulfur trif
- Lal, Gauri S.,Lobach, Elyse,Evans, Ann
-
p. 4830 - 4832
(2007/10/03)
-
- Selectively fluorinated organic compounds
-
A process for the preparation of a selectively fluorinated organic compound, which process includes reaction of a precursor of said organic compound, the precursor containing at least one Group VI element selected from sulfur, selenium and tellurium, with a fluorinating agent and another halogenating agent and characterized in that the fluorinating agent is elemental fluorine.
- -
-
-
- Electrolytic partial fluorination of organic compounds. 20. Electrosynthesis of novel hypervalent iodobenzene chlorofluoride derivatives and its application to indirect anodic gem-difluorination
-
Electrosynthesis of novel hypervalent iodobenzene chlorofluorides was successfully performed for the first time and it was demonstrated that p-methoxyiodobenzene chlorofluoride could be used as a mediator for indirect anodic gem-difluorination of dithioacetals.
- Fujita, Toshiyasu,Fuchigami, Toshio
-
p. 4725 - 4728
(2007/10/03)
-
- Desulfurative fluorination using nitrosonium tetrafluoroborate and pyridinium poly(hydrogen fluoride)
-
Nitrosonium tetrafluoroborate in conjunction with pyridinium poly(hydrogen fluoride) has been found to be excellent desulfurative fluorination reagent. In NO+BF4-/PPHF system, mono-fluorides and gem-difluordes have been obtained in high yields from the corresponding phenylsulfides and dithiolane derivatives, respectively. Copyright
- York, Chentao,Prakash, G. K. Surya,Olah, George A.
-
-
- Elemental fluorine. Part 5. Reactions of 1,3-dithiolanes and thioglycosides with fluorine-iodine mixtures
-
1,3-Dithiolanes, prepared from diaryl ketones, react with elemental fluorine-iodine mixtures to give the corresponding difluoromethylene derivatives. Under the same conditions, thioglycosides give glycosyl fluorides in good yields. Reaction of 1,3-dithiolanes with fluorine in aqueous acetonitrile provides a remarkably mild method for efficient deprotection to the parent ketone.
- Chambers, Richard D.,Sandford, Graham,Sparrowhawk, Matthew E.,Atherton, Malcolm J.
-
p. 1941 - 1944
(2007/10/03)
-
- The Conversion of Diaryl-1,3-Dithiolanes into gem-Difluoromethylene Compounds by a Combination of Elemental Fluorine and Iodine
-
Diaryl-1,3-dithiolanes are converted to gem-difluorides in good yield by reaction with a mixture of elemental fluorine and iodine in acetonitrile at room temperature.
- Chambers, Richard D.,Sandford, Graham,Atherton, Malcolm
-
p. 177 - 178
(2007/10/02)
-
- Electrolytic Partial Fluorination of Organic Compounds. 14. The First Electrosynthesis of Hypervalent Iodobenzene Difluoride Derivatives and Its Application to Indirect Anodic gem-Difluorination
-
The electrosynthesis of hypervalent iodobenzene difluorides was accomplished by anodic oxidation of p-nitro- and p-methoxyiodobenzenes with Et3N*3HF in anhydrous acetonitrile, and p-methoxyiodobenzene difluoride was used as a mediator for indirect anodic
- Fuchigami, Toshio,Fujita, Toshiyasu
-
p. 7190 - 7192
(2007/10/02)
-
- Anodic gem-Difluorination of Dithioacetals
-
Anodic desulfurization of dithioacetals of ketones in the presence of Et3N*3HF provided the corresponding gem-difluorocompounds while dithioacetals of aromatic and aliphatic aldehydes gave gem-difluorothioethers and monofluoro thioether, respectively.
- Yoshiyama, Tomonori,Fuchigami, Toshio
-
p. 1995 - 1998
(2007/10/02)
-
- Conversion of the Carbonyl Group to CF2 Using IF
-
A novel method for the transformation of CO -> CF2 is described.The easily made hydrazone derivatives of the carbonyl moiety are reacted under mild conditions with IF prepared directly from the corresponding elements.Various hydrazones have been examined and compared with each other.Unsubstituted ones are usually the most suitable although they are not always easy to purify and store.N-Methyl- and N,N-dimethylhydrazones also give quite satisfactory results.The more easily made dinitrophenyl hydrazones (DNPs), semicarbazones, and tosylhydrazones also react, but the yields of the desired CF2 compounds are usually lower.Oximes could also be successfully reacted.The two main byproducts of the reaction are the parent carbonyl compounds, which can be recycled, and the α-iododifluoro derivatives.The latter upon treatment with LiAlH4 or Bu3SnH were reduced to the desired product, thus increasing the overall yields.
- Rozen, Shlomo,Zamir, Dov
-
p. 4695 - 4700
(2007/10/02)
-
- OXIDATIVE FLUORINATION OF SULFIDES IN PRESENCE OF Et3N*3HF
-
Electrochemical oxidation of sulfides produces sulfonium ions.The reactivity of these ions versus fluoride anions is described.
- Brigaud, Thierry,Laurent, Andre,Laurent, Eliane
-
p. 153 - 156
(2007/10/02)
-
- Process for the preparation of compounds containing a difluoromethylene or trifluoromethyl group
-
A process for the preparation of compounds containing a difluoromethylene or trifluoromethyl group. A compound containing a carbonyl group, preferbly an acid, acid halide, amide, ketone or any compound containing a perhaloalkylcarbonyl moiety is placed, in anhydrous liquid hydrofluoric acid, in contact with boron trifluoride in a quantity such that the absolute pressure of boron trifluoride in the reaction system is at least one bar for a time sufficient to convert the carbonyl group to a difluormethylene or trifluoromethyl group. The compounds obtained are useful as synthesis intermediates in the pharmaceutical, plant-protection and dye industries, as anesthetics or as heat-transfer and lubricating fluids.
- -
-
-
- A MILD, CONVENIENT, HALOGEN-EXCHANGE ROUTE TO GEM-DIFLUORIDES AND TRIFLUORIDES
-
Reaction of gem-dihalides R1R2CX2 (X=Cl or I) and of PhCCl3 with AgBF4 at room or sub-ambient temperatures affords the corresponding gem-difluorides and trifluoride in unoptimised yields of 35-84percent.
- Bloodworth, A. J.,Bowyer, Kevin J.,Mitchell, John C.
-
p. 5347 - 5350
(2007/10/02)
-
- gem-Difluoro Compounds: A Convenient Preparation from Ketones and Aldehydes by Halogen Fluoride Treatment of 1,3-Dithiolanes
-
gem-Difluoro compounds can be prepared from ketones and aldehydes by formation of the corresponding 1,3-dithiolanes, followed by reaction with 1,3-dibromo-5,5-dimethylhydantoin and pyridinium poly(hydrogenfluoride) (HF-pyridine) in methylene chloride.The
- Sondej, Susan C.,Katzenellenbogen, John A.
-
p. 3508 - 3513
(2007/10/02)
-