A,/?-Ethylenesulfones

Diacyl sulfides a,/3-Ethylenesulfones a-KetoUiiolic acid esters a,jS-Oxidosulfoxides... 

Alkylation of 4-methyl-3-pyrazolidinone with butyl ethylenesulfonate gave alkylation at N-l with addition of nitrogen at the /3-position of the a,/3-unsaturated system.1209 Earlier workers have claimed that nitrosation of 3-pyrazolidinones leads to either substitution at C-4446 or oxidation to 2-pyrazolin-5-ones followed by substitution at q 4 sis, 1550 However, later workers uniformly report that nitrosation occurs at N-l (eq. 247).911-1342,1491 Treatment of 3-pyrazolidinones... 

Diacyl sulfides a,j8-Ethylenesulfones a-Ketothiolic acid esters a,/3-Oxidosulfoxides... 

Acyl-4-hydroxy-3-thio-semicarbazides P-Azido-a, P-ethylenesulfones a-Cyano-N-sulfonylhydrazines... 

Fig. 15. Energy of proton dissociation (Ez) from Z times ionized polyelectrolyte molecules as function of the degree of dissociation (a). (A) - PPAL (1), PPAS (2), PPA (3), polyfmethacrylic acid) (4), copolymer of acrylic acid with ethylenesulfonic acid (50 50) in aqueous solutions (5), (B) - PPAL (1), PPAS (2), PPA in the presence of NaCl (3) ( ) INaClj = 0 (X) fNaCll = 0.25 mmol/1 (o) 0.50 mmol/1...

Aral and Ise carried out the hydrolysis of dextrin in the presence of copolymers of vinyl alcohol and vinylsulfonic aethylenesulfonic acid unit relative to sulfuric add, Acopoiymet/ H2S04> increased from 1 to 1.4 at 80 °C, as the mole ratio of hydroxyethylene and ethylenesulfonic add repeat units wsB varied from nearly zero to 100. On the other hand, mixtures of pofy(ethylenesul-fonic add) 3 and poly(vinyl alcohol) possessed a catalytic efficiency lower than that of sulfuric add. 

A mixture of 6.7 gm. methyl ethylenesulfonate, 4 gm. cyclo-pentadiene, and toluene heated 10 hrs in a sealed tube at 140-150 7.7 gm. methyl 2,5-endomethylene-3-cyclohexene-l-sulfonate. (A. Lambert and J. D. Bose, Soe. 1949, 46.)... 

M PhLi in ether added dropwise to a 2.5 M soln. of (/-PrO)3TiCl in hexane at 0°, stirred for 1 h at 20°, the suspension treated with a soln. of startg. mesylate, 2.5 mol.% bis (71-allylpalladium chloride), and 20 mol.% maleic anhydride in 3 1 benzene/ether, and worked up after 8 h at 20° - /ru 5-l-phenyl-2,7-octadiene. Y 93%. F.e., Pd-catalysts, and cross-coupling with acoxy-2-ethylenes, aryloxy-2-ethylenes, and p,y-ethylenesulfones, s. A.N. Kasatkin et al., Izv. Akad. Nauk SSSR Ser. Khim. 1988, 2159-66. 

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