Reaction of 2-hydroxy-5-nitrotoluene-α-sulphonic acid sultone with nucleophiles
作者:Timothy Deacon、Alex Steltner、Andrew Williams
DOI:10.1039/p29750001778
日期:——
The title sultone is cleaved in the presence of nucleophiles in aqueous solution via general base-catalysed and nucleophilic pathways. The sensitivity of the nucleophilic reactivity to reagent structure (βN) suggests extensive bond formation in the transition state. Proton transfer for nucleophilic attack by amines occurs after the S–N bond forming process is complete.
Generation of ortho-quinone methides upon thermal extrusion of sulfur dioxide from benzosultones
作者:Krzysztof Wojciechowski、Karolina Dolatowska
DOI:10.1016/j.tet.2005.06.087
日期:2005.8
3H-1,2-Benzoxathiole 2,2-dioxides (benzosultones) undergo thermal extrusion of sulfurdioxide to form ortho-quinone methides that enter Diels–Alder reaction with maleimides to form chroman 2,3-dicarboxylic acid derivatives.
3 H -1,2-苯恶硫醇2,2-二氧化物(苯甲砜)经历二氧化硫的热挤压,形成邻苯醌甲基化物,后者与马来酰亚胺进入Diels-Alder反应,形成苯并二氢吡喃2,3-二羧酸衍生物。
Catalysis in aprotic solvents. Effect of the polarity of the catalyst.
作者:Ennio Ciuffarin、Mauro Isola、Piero Leoni
DOI:10.1016/s0040-4039(01)93297-6
日期:1981.1
The catalytic constants for the n-butylaminolysis of sultones in aprotic-apolar solvents are linearly correlated with a combination of the hydrogen-bonding parameter and the polarity parameter of the catalyst.
Catalysis in aprotic solvents. Inter- and intramolecular hydrogen bonding complexation
作者:Ennio Ciuffarin、Mauro Isola、Piero Leoni
DOI:10.1021/jo00328a015
日期:1981.7
Reactions of nucleophiles with strained cyclic sulfonate esters. Broensted relationships for rate and equilibrium constants for variation of phenolate anion nucleophile and leaving group
作者:Timothy Deacon、Charles R. Farrar、Bernardus J. Sikkel、Andrew Williams