Nucleophilic Substitution Reactions of Aryl Dithiocyclohexanecarboxylates with Anilines in Acetonitrile
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Nucleophilic Substitution Reactions of Aryl Thiophene-2-carbodithioates with Pyridines in Acetonitrile
The kinetics of reactions between Z-aryl thiophene-2-carbodithioates and X-pyridines in acetonitrile at 60.0 C have been investigated. The Brönsted plots obtained for the pyridinolysis of aryl thiophene-2-carbodithioates are curved, with the center of curvature at pKa ~ 5.2 (pKa). The Brönsted plots for these nucleophilic reactions show a change in slope from a large (βX ≅ 0.78-0.87) to a small...
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The 2,3,4-tri-toluenesulfonate ester derivatives of the methyl pyranosides of l-arabinose, d-ribose, d-lyxose, and d-xylose have been prepared, and their substitution reactions with various nucleophiles have been examined. For arabinose, xylose, and ribose, highly regioselective monosubstitutions were observed with benzoate, nitrite, and azide anions. These reactions have led to short and simpl...
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2-Aryl-6-cyano-7-methyl-5-indolizinones were successfully converted into 2-aryl-5-chloro-6-cyano-7-methylindolizines. The obtained 5-chloroindolizines readily underwent nucleophilic substitution at position 5 leading in high yields to novel 5-functionalised indolizines.
متن کاملNucleophilic Substitution Reactions of α-Bromoacetanilides with Benzylamines
Kinetic studies of the reactions of α-bromoacetanilides [YC6H4NHC(=O)CH2Br] with substituted benzylamines (XC6H4CH2NH2) have been carried out in dimethyl sulfoxide at 35.0 C. The Hammett plots for substituent (Y) variations in the substrate (log kN vs. σY) are biphasic concave upwards/downwards with breaks at Y = 4-Cl (σY = 0.23). The Hammett coefficients ρY and the cross-interaction constant ρ...
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ژورنال
عنوان ژورنال: Bulletin of the Korean Chemical Society
سال: 2010
ISSN: 0253-2964
DOI: 10.5012/bkcs.2010.31.6.1785