cas 38496-18-3, 2,6-Dichloronicotinic acid | Articles data ｜lookchem

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38496-18-3

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A convenient synthesis of [2,6-14C]-2-chloroisonicotinic acid
[2,6-14C]-2-chloroisonicotinic acid (1) was prepared by kinetically controlled lithiation and carbonation of [2,6-14C]-2,6-dichloropyridine, followed by reduction using hydrazine and potassium hydroxide. Copyright
Kelly, Terence P.,Rodgers, Thomas R.,Wright, Christopher
p. 451 - 457
(2001)
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CONTRASTING REACTIONS OF 2,6-DICHLORO-4-TRICHLOROMETHYLPYRIDINE, 2,6-DICHLORO-3-TRICHLOROMETHYLPYRIDINE AND THEIR N-OXIDES WITH NUCLEOPHILES
Various nucleophiles react with 2,6-dichloro-4-trichloromethylpyridine and 2-chloro-6-trichloromethylpyridine as expected, by displacement of ring chlorine atoms.But in the reactions of nucleophiles with 2,6-dichloro-3-trichloromethylpyridine and 2,6-difluoro-3-trifluoromethylpyridine, displacement of ring halogen atoms is accompained or followed by multiple attack at the trihalogenomethyl group.The reactivity of the trihalogenomethyl groups is modified by N-oxidation.A mechanism for the peculiar reactivity of the trihalogenomethyl groups is proposed, involving loss of halide ion from the CX3 group assisted by Ione pairs on substituents or negative charge in Meisenheimer intermediates.Both geometrical isomers of 1,2-dichloro-1,2-bis(2,6-dichloro-3-pyridyl)ethene are described.
Dainter, Ronald S.,Suschitzky, Hans,Wakefield, Basil J.
p. 227 - 234
(2007/10/02)

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Chemical Properties

Appearance/Colour :off-white to yellow solid
Melting Point: 140-143 °C(lit.)
Boiling Point: 351.2 °C at 760 mmHg
Flash Point:166.2 °C
Density: 1.612 g/cm³
Solubility:DMSO, Methanol
Storage Temp.:Keep in dark place,Sealed in dry,Room Temperature
Vapor Pressure: 1.56E-05mmHg at 25°C
Refractive Index: 1.605
PKA: 1.77±0.28(Predicted)
BRN: 136114
PSA: 50.19000
LogP: 2.08660

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