Results 101 to 110 of about 563 (145)

Ultrasound promoted facile synthesis of some pentafluoropyridine derivatives at ambient conditions

Ultrasonics Sonochemistry, 2011
Some pentafluoropyridine derivatives have been synthesized by the reaction of pentafluoropyridine with appropriate mono and bidentate nucleophile under ultrasonic irradiation. This new methodology provides good to excellent yields in short reaction times (25-120 min) at room temperature.
Reza Ranjbar-Karimi, Ali Darehkordi
exaly   +3 more sources

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The gas phase photolysis of pentafluoropyridine

Journal of Photochemistry, 1980
Abstract Continuous photolysis of pentafluoropyridine produced the Dewar isomer which underwent rearomatization with a half-life of about 5 days at room temperature. Flash photolysis of pentafluoropyridine gave two transients which decayed with half-lives of 22 ms and 3 ms respectively.
Ratajczak, Emil, Sztuba, Barbara
openaire   +2 more sources

Regiospecific photohydroxyalkylation of pentafluoropyridine

Journal of Heterocyclic Chemistry, 1978
AbstractIrradiation of 1‐hydroxyalkane solutions of pentafluoropyridine in the presence of benzo‐phenone resulted in regiospecific substitution at position 4, thus forming 2,3,5,6‐tetrafluoro‐4‐(1‐hydroxyalkyl)pyridine.
Boris Sket, Marko Zupan
openaire   +1 more source

Chemistry and Dynamics of Interaction of Nucleosides with Pentafluoropyridines.

ChemInform, 2005
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access the actual ChemInform Abstract, please click on HTML or PDF.
V V, Litvak, I Ya, Mainagashev, O G, Bukhanets   +2 more
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ChemInform Abstract: REGIOSPECIFIC PHOTOHYDROXYALKYLATION OF PENTAFLUOROPYRIDINE

Chemischer Informationsdienst, 1978
AbstractBei der Photolyse erhält man aus Benzophenon (II) und den Carbinolen (I) über radikalische Zwischenstufen (III) und (IV) neben den Dimeren (V) in Gegenwart von Pentafluorpyridin (VI) die Substitutionsprodukte (VII).
B. SKET, M. ZUPAN
openaire   +1 more source

Reaction of sodium diethylnitroxide with fluorobenzenes, pentafluoropyridine and halogenopyridines

Journal of Fluorine Chemistry, 1989
Abstract Treatment of pentafluoropyridine with sodium diethylnitroxide in diethyl ether gave tetrafluoropyridines 4-RC 5 F 4 N(R = ONEt 2 , NEt 2 , NHEt and O − H 2 N + Et 2 ); in the presence of p -dinitrobenzene only the hydroxylamine (R = ONEt 2 ) was detected.
Ronald Eric Banks, Waheed Jondi, Anthony Edgar Tipping   +2 more
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ChemInform Abstract: REACTION OF PENTAFLUOROPYRIDINE WITH BIFUNCTIONAL NUCLEOPHILES

Chemischer Informationsdienst, 1975
AbstractUnter verschiedenen Bedingungen setzt sich Pentafluorpyridin (I) mit den bifunktionellen Nucleophilen (II) zu den 4‐substituierten Derivaten (III) um.
JERZY WIELGAT, ZDZISLAW DOMAGALA
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ChemInform Abstract: THE PENTAFLUOROPYRIDINE CATION C5F5N(1+)

Chemischer Informationsdienst, 1981
AbstractOäAsFg oxidiert Pentafluorpyridin (I) zu dem Kation (II), das sich thermisch unter Disproportionieren zu einem Gemisch des Addukts (III) mit dem (I)′ASF5‐Addukt zersetzt.
K. + ZUECHNER, T. J. RICHARDSON, O. GLEMSER, N. BARTLETT   +3 more
openaire   +1 more source

BINOL Modification via SNAr Reactions with Pentafluoropyridine

Mendeleev Communications, 2015
(R)- and (S)-binaphthyl-2,2’-diols (BINOLs) smoothly react with pentafluoropyridine without racemization to give (R)- and (S)-2,2’- bis(tetrafluoropyridin-4-yloxy)-1,1’-binaphthyls. The 2(6)-positioned pyridine fluorine atoms can be replaced with amino moieties by reactions with amines.
Konstantin Yu. Koltunov, Aleksey N. Chernov   +1 more
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Survey reactivity of 5-substituted tetrazoles toward pentafluoropyridine

Journal of Fluorine Chemistry, 2019
Abstract Reactivity of some 5-substituted tetrazoles with pentafluoropyridine under basic conditions in acetonitrile was investigated. The reaction of pentafluoropyridine with tetrazoles regioselectively occurs at the 4-position of pyridine ring by N2 in the tetrazole ring.
Reza Ranjbar-Karimi, Alireza Poorfreidoni   +1 more
exaly   +2 more sources