Results 11 to 20 of about 563 (145)

One-pot ester and thioester formation mediated by pentafluoropyridine (PFP) [PDF]

Organic & Biomolecular Chemistry, 2022
Acyl fluorides are valuable synthetic intermediates, but in some cases they can be challenging to handle and difficult to isolate given their susceptibility to degradation.
Beardmore, Liam N.D., Liam N. D. Beardmore, Cobb, Steven L., Brittain, William D.G., William D. G. Brittain, Steven L. Cobb   +5 more
core   +4 more sources

Oxidative Addition of C-F Bonds to the Phosphoranide Ion [P(C₂F₅)₂F₂]^. [PDF]

Chemistry
The difluorobis(pentafluoroethyl)phosphoranide anion (λ$\lambda $4σ$\sigma $4‐phosphate) reacts with substrates containing activated C─F bonds (Rf = perfluoroaryl, ‐alkenyl, and ‐acetyl) yielding corresponding trifluorophoshates. The colorless solids exhibit a high thermal stability and are bench stable.
Hartmann L, Neumann B, Stammler HG, Kessler M, Hoge B.   +4 more
europepmc   +2 more sources

Reactions of pentafluoropyridine with amidoximes

Journal of the Iranian Chemical Society, 2017
In this paper, site reactivity of amidoximes with pentafluoropyridine under basic conditions in dry CH3CN was investigated. The aromatic nucleophilic substitution of pentafluoropyridine with amidoximes occurs in the 4-position of the pyridine ring by the oxygen site of amidoximes and followed by reaction of other sites, depending on reaction conditions.
Reza Ranjbar-Karimi, Alireza Poorfreidoni   +1 more
exaly   +3 more sources

Trigonal Phosphine Umpolung: Electrophilicity Driven by a Redox-Active Boron Cluster. [PDF]

Chemistry
Coupling of a phosphine to a redox‐active cluster enables polarity reversal, or umpolung, at phosphorus. Phosphines are classically known for their nucleophilicity, and while electrophilic reactivity has been observed in geometrically constrained, non‐trigonal systems, similar behavior in ordinary trigonal phosphines is rare.
Nussbaum BC, Smith MD, Peryshkov DV.
europepmc   +2 more sources

Anion-Π Meets H-Bonding: Tuning Synergy Through the Flexibility-to-Preorganization Transition in Anion Receptor Design. [PDF]

Chemphyschem
Three anion receptors combining both hydrogen bonding and anion‐π interactions are synthetized, involving different spacers in order to evaluate the influence of molecular preorganization and rigidity on chloride binding. The naphthalene spacer in receptor 3 leads to more effective anion binding compared to flexible or less‐structured systems.
Zayene O, Hu J, Gaucher A, Plais R, Barday M, Moreau X, Salpin JY, Prim D.   +7 more
europepmc   +2 more sources

Mesoionic N-Heterocyclic Olefins, Imines, Thiones, Phosphinidenes and Their Application in Catalysis. [PDF]

Angew Chem Int Ed Engl
This minireview covers recent advances in the synthesis, reactivity, and metal‐free catalytic uses of mesoionic N‐heterocyclic olefins (mNHOs), imines (mNHIs), thiones (mNHTs), and phosphinidenes (mNHPs). Abstract Transition metal compounds are widely known for their ability to activate small molecules and are excellent catalysts for a wide range of ...
Maji S, P S, Hansmann MM, Mandal SK.
europepmc   +2 more sources

Tetrahydropyrido 3,4-b pyrazine scaffolds from pentafluoropyridine

The Journal of Organic Chemistry, 2005
Representative polyfunctional tetrahydropyrido[3,4-b]pyrazine scaffolds have been synthesized very readily by a one-pot annelation reaction of pentafluoropyridine with appropriate diamines.
Yufit, D.S., Sandford, G., Slater, R., Vong, A., Howard, J.A.K.   +4 more
core   +4 more sources

Charge density studies on 2,3,5,6-tetrafluoro- and pentafluoropyridine

CrystEngComm, 2013
Stammler H-G, Vishnevskiy Y, Sicking C, Mitzel NW. Charge density studies on 2,3,5,6-tetrafluoro- and pentafluoropyridine. Crystengcomm. 2013;15(18):3536-3546.Crystals of 2,3,5,6-tetrafluoropyridine and pentafluoropyridine have been grown by in situ ...
Vishnevskiy, Yury, Stammler, Hans-Georg, Mitzel, Norbert W., Sicking, Constantin   +3 more
core   +3 more sources

Pentafluoropyridine as a fluorinating reagent for preparing a hydrocarbon soluble β-diketiminatolead(ii) monofluoride

Chemical Communications, 2011
A well-designed method for the preparation of β-diketiminatolead(ii) monofluoride has been developed using LPbNMe2 (L = [CH{C(Me)(2,6-iPr2C6H3N)}2]) and pentafluoropyridine (C5F5N).
Sankaranarayana Pillai Sarish, Jana, Anukul, Objartel, Ina, Herbert W. Roesky, Leusser, Dirk, Sarish, Sankaranarayana Pillai, Ina Objartel, Dirk Leusser, Dietmar Stalke, Stalke, Dietmar, Roesky, Herbert W., Anukul Jana   +11 more
core   +4 more sources

Oxidative Addition Versus Substitution Reactions of Group 14 Dialkylamino Metalylenes with Pentafluoropyridine

Inorganic Chemistry, 2013
Diallcylamino compounds of group 14 elements (Si, Ge, Sn) in the +2 oxidation state supported by benzamidinate ligands were synthesized and treated with pentafluoropyridine. Two different modes of reactivity were observed, depending on the metal atom and
Samuel, Prinson P., Singh, Amit Pratap, Objartel, Ina, Sarish, Sankaranarayana Pillai, Matussek, Julia, Stalke, Dietmar, Roesky, Herbert W.   +6 more
core   +4 more sources