Isopropyl phenyl sulfone

As far as the situation of the sulfonyl group and derivatives of the sulfonyl group is concerned, there are conflicting results in the literature—at least at first sight. Zimmerman and Thyagarajan " (measurements in ether and hydrocarbon solvents) and Cram and coworkers (measurements in DMSO) reported that the equilibrium acidities of isopropyl- and cyclopropyl phenyl sulfone, 273 and 274, respectively, are roughly equal. 

The reaction of cyclohexanone with bis(2-aminoethyl)disulfide, under nitrogen and in the presence of toluene-p-sulfonic acid, afforded the dihy-drothiazine 117 and 2-mercaptoethylamine, probably by way of the intermediate 116 cyclooctanone, 2,6-dimethylheptan-4-one, and isopropyl phenyl ketone behaved similarly. ... 

Naphthalenesulfonic acid, 6-amino-4-hydroxy-5-((2-(trifluoromethyl) phenyl) azo)-, monosodium salt. See Acid red 337 Naphthalenesulfonic acid, bis-(l-methylethyl)-, sodium salt. See Sodium isopropyl naphthalene sulfonate... 

Methyl phenyl sulfone 1-Methyl-4-(phenylthlo)benzene (2-Methylphenyl)thlourea A/-Methyl-A/ -phenylthlourea Methyl phosphate Methylphosphine Methylphosphonicacid Methylphosphonic dltluorlde Methylphosphonofluondicacid, isopropyl ester... 

Isopropyl 2-iodoxybenzoate is a useful reagent for the clean, selective oxidation of organic sulfides to sulfoxides [1127]. This reaction proceeds without overoxidation to sulfones and is compatible with the presence of the hydroxy group, double bond, phenol ether, benzylic carbon and various substituted phenyl rings in the molecule of organic sulfide. Duschek and Kirsch have reported that isopropyl 2-iodoxybenzoate in the presence of trifiuoroacetic anhydride can be used for the a-hydroxylation of p-keto esters at room temperature in THF [1128]. 

PMR spectroscopy has been applied to the characterisation of a wide range of homopolymers including PMMA [286-289], PVC [290-294], PS [293, 295, 296], polyvinyl ethers [297-300], polyacrylic acid [301], poly(methyl-a-chloroacrylate) [302], carboxy terminated polybutadiene [303], poly(a-methyl styrene) [304], natural rubber [305-307], chlorinated polyisobutylenes [308], sulfonated PS resins [309, 310], polyvinyl phenyl ether [311], lactone polyester [312], chlorinated PVC [313], PC [314], poly 1,3 butadiene [315], poly-2-allyl phenyl acrylate [316], poly(4-methyl-pentene-1) [317], polymethacrylic acid [318], PP [296], cyclic ethers [319], polymethacrylonitrile [320], poly(a-methyl styrene) tetramer [321], PEG [322], PE [289], polyacrylamide [311], polymethylacrylamide [323], polypyrrolidone [324], polychloroprene [325], phenol formaldehyde resins [326, 327], Nylon 66 [328], polyvinylidene fluoride [329], polyvinyl formate [330], polyacrylonitrile [331], epoxy resins [332], allyl biguanide [333], poly(2-isopropyl-2-oxazollines) [334] and trehalose vinyl benzyl ether [335]. 

Mosse and Alexakis [66] reported in 2005 the first organocatalyzed 1,4-conjugate addition of aldehydes to vinyl sulfones. The organocatalyst, N-tPr-2,2 -bipyrrolidine (2), induced a good enantioselectivity when using l,l-bis(benzenesulfonyl) ethylene (72) while phenyl vinyl sulfone (73) was not reactive under the same conditions (Scheme 34.26). As product 74 is sensitive to silica gel, it is accompanied by byproduct 75. To explain the observed selectivity, the authors suggested a transition state where the pyrroUdine moiety bearing the isopropyl substituent shields the Re face of the enamine and locks the conformation of the enamine intermediate. 

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