Nitrophenyl sulfones

Bis-(4-fluoro-3-nitrophenyl) sulfone [312-30-1] M 344.3, m 193-194 . Recrystd from Me2CO and H2O (5 1). It should give a yellow colour in aqueous base. [Chem Ber 86 172 1953.]... 

The thermotropic aromatic main chain liquid crystalline polymers are also prepared by the phase transfer catalyzed aromatic nucleophilic polymerization [87]. Polyetherification of bis(4-chloro-3-nitrophenyl) sulfone with mesogenic aromatic diols is shown below ... 

Dinitrodipheny I sulfone or Bi s(nitrophenyl)-sulfone, 02N.C6H4.S02-C6H4.N02 mw308.27 N 9.30%. Five isomers are known ... 

Trinitrodipheny Isulfone, crysts (from glac acet ac), mp 196—97° was prepd by heating 4-chloro-rl,3-dinitrobenzene or 2,4-dinitrophenyl-p-toluenesulfonate with Na 3-nitrobenzene-l-sulfinate in aq ale (Refs 1 St 3) 3,5,4 TrinitrodiphenyIsulfone, ndls, mp 199° prepd by heating 3 nitrophenyI-(4-nitrophenyl)-sulfone with a mixt of fuming nitric acid 8c sulfuric acid at 150°(Refs 2St4)... 

A series of nitro compounds has been reduced in good yield by warming them with a powdered copper-magnesium alloy (Arndt alloy) in the presence of water and a little ammonium chloride,72 examples being />-nitroaniline (93%), bis-(/>-nitrophenyl) sulfone (70%), and 1-nitroanthraquinone (70%). 

Other examples are the preparation of methyl / -nitrophenyl sulfone,607 various alkyl tolyl sulfones, and 2-chloroethyl tolyl sulfone.608... 

Alkyl and aryl /7-nitrophenyl sulfones have been obtained in yields averaging 80% by oxidizing the appropriate sulfides with chromic acid in glacial acetic acid612 according to the following general directions ... 

Phenacyl o-nitrophenyl sulfone hydrogenated with 10%-Pd-on-charcoal in ethyl acetate-acetic acid at room temp, and atmospheric pressure until 2 moles of hydrogen are absorbed 3-phenyl-4-hydroxy-4H-l,4-benzothiazine 1,1-dioxide. Y 11%. - Further hydrogenation leads to deoxygenation of the nitrogen. F. e. s. G. Pagani, G. 97, 1804 (1967). 

Recent study by Klotz, Kiefer and others [32] shows that the hydrolysis of 2-hydroxy-5-nitrophenyl sulfonate can be accelerated by a polyethylenimine derivative by a factor of 10. As far as we know, this is the largest acceleration by synthetic polyelectrolytes, and is presumably related to the branched structure of the polymer. 

Mirk D, Grassot JM, Zhu JP. Synthesis of 4-nitrophenyl sulfones and application in the modified Julia olefination. Syn-/c 2006 (8) 1255-1259. 

Methyl (4-methyl-2-nitrobenzenesulfonyl) acetate refluxed 20 hrs. in 95%-metha-nol containing piperidine methyl 4-methyl-2-nitrophenyl sulfone. Y 95%. F. e. and limitations s. R. T. Coutts and E. M. Smith, Can. J. Chem. 45, 975 (1967). 

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