88073-51-2Relevant academic research and scientific papers
Aryl(sulfonyl)amino group: A convenient and stable yet activated modification of amino group for its intramolecular displacement
Kato, Yuzo,Yen, Dinh Hoang,Fukudome, Yasuhiro,Hata, Takeshi,Urabe, Hirokazu
supporting information; experimental part, p. 4137 - 4139 (2010/11/04)
Aryl(sulfonyl)amino groups, readily derived from sulfonyl- or arylamines by standard methods as well as the recently introduced methods of sulfonylation and arylation, proved to be good leaving groups in intramolecular substitution reactions by various nitrogen, oxygen, and carbon nucleophiles.
TRANSITION STATES IN INTRAMOLECULAR SN2 REACTIONS OF CARBANIONS. THE CLOSURE OF THREE-, FOUR- AND FIVE-MEMBERED RINGS
Benedetti, Fabio,Fabrissin, Silvio,Rusconi, Alessandro,Stirling, Charles J. M.
, p. 233 - 240 (2007/10/02)
The intramolecular displacement of aryl ethyl sulphonium by carbanions stabilised by two sulphonyl groups has been studied.Rates of cyclisation of three-, four- and five-membered rings follow the same trend observed in the analogous displacement of halides.The effects of substituents on the leaving group show that, in the series considered, variations in the extent of bond cleavage to the leaving group are small.
Elimination and Addition Reactions. Part 40. The Insignificant Effect of Strain in Higher Order Eliminations in 1,1-bis(phenylsulphonyl) Carbanions with ω-Leaving Groups
Benedetti, Fabio,Stirling, Charles J.M.
, p. 605 - 612 (2007/10/02)
Rates of cyclisation of 1,1-bis(phenylsulphonyl) carbanions bearing distal leaving groups have been determined.The response of the system to solvent effects and to leaving group is similar to that in intramolecular nucleophilic substitution.The system is
Phase Transfer Catalysed Alkylations of Bis(benzenesulfonyl)methane
Koteswar Rao, Y.,Nagarajan, M.
, p. 1031 - 1033 (2007/10/02)
Alkylations of bis(benzenesulfonyl)methane under phase transfer catalysed conditions are reported.Variations in the phase transfer catalyst, alkylating reagent and the cosolvent have been studied with a view to understanding the course of the reaction.Opt
Activation Parameters for Intramolecular Nucleophilic Substitution by Carbanions - the Insignificant Effect of Ring Strain on Cylisation Rates
Benedetti, Fabio,Stirling, Charles J. M.
, p. 1374 - 1376 (2007/10/02)
Activation parameters for the cyclisation of bis-sulphonyl-stabilised carbanions to bis-sulphonylcycloalkanes have been determined; cyclopropanes form nearly a million-fold faster than cyclobutanes and ring strain is a negligible factor in determining rea
Hydrogen Bonds involving Polar CH Groups. Part 10. Intramolecular Hydrogen Bonds in 1-(ω-Substituted-alkyl) Bis(phenylsulphonyl)methanes
Li, Chuen,Sammes, Michael P.
, p. 2193 - 2196 (2007/10/02)
Intramolecular hydrogen bonds involving the polar methine group have been detected by 1H n.m.r. spectroscopy in dichloromethane in 1-(ω-methoxyalkyl)- and 1-(ω-dialkylaminoalkyl)-bis(phenylsulphonyl)methanes.Dialkylamino groups are more effective don
