cas 2879-42-7, 3-Chloro-2,5,6-trifluoropyridine

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Reactions of polyfluoroaromatic compounds with electrophilic agents in the presence of tris(dialkylamino)phosphines 8. Replacement of fluorine by hydrogen in polyfluoroaromatic compounds
When reacted with P(NEt2)3 and a proton donor, pentafluoropyridine, 3-chlorotetrafluoropyridine, pentafluorobenzonitrile, and octafluorotoluene yield products of replacement of the fluorine atom by hydrogen at position 4. This proces
Bardin
p. 1434 - 1436
(1997)
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Process for preparing 2-aminopyridine derivatives
A method for preparing 2-aminopyridine derivatives, which comprises substituting of fluorine for hydrazine moiety and reducing with hydrogen using 3-substituted-2,5,6-trifluoropyridine as a starting material, provides 2-aminopyridine derivatives having a purity over 98% under a mild reaction condition.
-
Page/Page column 3

(2008/06/13)

Removal of fluorine from and introduction of fluorine into polyhalopyridines: An exercise in nucleophilic hetarenic substitution
Starting from six industrially available fluorinated pyridines, an expedient access to all three tetrafluoropyridines (2-4), all six trifluoropyridines (5-10), and the five non-commercial difluoropyridines (11-14 and 16) was developed. The methods employed for the selective removal of fluorine from polyfluoropyridines were the reduction by metals or complex hydrides and the site-selective replacement by hydrazine followed by dehydrogenation-dediazotation or dehydrochlorination-dediazotation. To introduce an extra fluorine atom, a suitable precursor was metalated and chlorinated before being subjected to a chlorine/ fluorine displacement process.
Bobbio, Carla,Rausis, Thierry,Schlosser, Manfred
p. 1903 - 1910
(2007/10/03)

Reductive transformations of organofluorine compounds: II. Hydrodechlorination of chloropolyfluoroarenes by the action of zinc
Polyfluoroarenes containing chlorine atoms in the aromatic ring and/or in the benzylic position undergo hydrodechlorination by the action of zinc in aqueous dimethylformamide. The use of Zn/Cu and addition of salts (NaCl, Na2SO4, NH4Cl) favor reductive dechlorination of the Carom - Cl bond. Polyfluorobenzotrichlorides react with excess zinc to give the corresponding CH3-substituted derivatives, otherwise CH2Cl- and CHCl2-containing compounds are formed. The reduction of C6F5CCl3 and C6F5CH2Cl with zinc in the presence of copper provides lower yields of the hydrodechlorination products and leads to formation of 1,2-bis(pentafluorophenyl)ethane.
Krasnov,Platonov
p. 1488 - 1499
(2007/10/03)

HYDROGENOLYSIS OF Carom-F BONDS IN POLYFLUORINATED AROMATIC COMPOUNDS BY THE ACTION OF Zn(Cu)
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Krasnov, V. I.,Platonov, V. E.
p. 895 - 896
(2007/10/02)

Chemical Properties

Boiling Point: 151.7 °C at 760 mmHg
Flash Point:45.6 °C
Density: 1.562 g/cm³
Storage Temp.:under inert gas (nitrogen or Argon) at 2-8°C
Vapor Pressure: 4.62mmHg at 25°C
Refractive Index: 1.456
PKA: -10.80±0.20(Predicted)
BRN: 1424722
PSA: 12.89000
LogP: 2.15230

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2879-42-7

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Chemical Properties

Boiling Point: 151.7 °C at 760 mmHg

Flash Point:45.6 °C

Density: 1.562 g/cm³

Storage Temp.:under inert gas (nitrogen or Argon) at 2-8°C

Vapor Pressure: 4.62mmHg at 25°C

Refractive Index: 1.456

PKA: -10.80±0.20(Predicted)

BRN: 1424722

PSA: 12.89000

LogP: 2.15230

Global suppliers and manufacturers of 2879-42-7total 39 suppliers on LookChem

Article Database

2879-42-7

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Chemical Properties

Boiling Point: 151.7 °C at 760 mmHg

Flash Point:45.6 °C

Density: 1.562 g/cm3

Storage Temp.:under inert gas (nitrogen or Argon) at 2-8°C

Vapor Pressure: 4.62mmHg at 25°C

Refractive Index: 1.456

PKA: -10.80±0.20(Predicted)

BRN: 1424722

PSA: 12.89000

LogP: 2.15230

Global suppliers and manufacturers of 2879-42-7total 39 suppliers on LookChem

Density: 1.562 g/cm³