Phenylsulfone

Copper-plating bath compositions of various types have been used. A typical bath formulation consists of 200 g copper sulfate crystals, 30 mL cone, sulfuric acid, 2 mL phenylsulfonic acid, and 1000 mL distUled water. A pure copper anode may be used a copper anode containing a trace of phosphoms reduces sludge accumulation in the plating bath. 

Trimethylsilylethyl phenylsulfone (phenyl-2-trimethylsilylethylsulfone) [73476-18-3J M 242.4, m 52°. Dissolve in Et20, wash with saturated HCO3, saturated NaCl, H2O and dried (MgS04). Evaporation leaves residual crystals m 52°. [Tetrahedron Lett 23 1963 1982, J Org Chem 53 2688 1985.]... 

In 2-substituted dinitrothiophenes, phenylsulfone and p-nitro-phenoxy groups both react faster than the chloro group with pyridine, i.e., in a reverse order with respect to l-substituted-2,4-dinitro-benzenes, although with both substrates the factors involved are small. 

Zur Reduktion von Thiiran-S,S-dioxiden zu Olefinen bzw. von a-Phenylsulfon-stilben zu Stilben s.S. 464. 

Table 3.. V-Phenylsulfon i m idoyl chlorides with alkynes in the presence of Lewis acids...

Radical allylation of B-alkylcatecholboranes using easily available allyl-sulfones has been described [109-111]. By using phenylsulfones, the fragmentation produces a stable phenylsulfonyl radical that reacts with B-alkyl-... 

Trifluoromethyl phenylsulfone is accessible from fluoroform and diphenyldisul-fide, and it has been proposed as a donor of CF3. However, the reaction must be performed in basic medium (f-BuOK) and is then limited to nonenolizable aldehydes and ketones. But it can also be used as a precursor of the Ruppert reagent. This latter... 

Anomeric triphenylphosphonium salts have been used as well as phenylsul-fides,but in the latter case extra stabilization is necessary (see below). Anomeric nitrosugars, which have been extensively studied in C-glycosylation reactions by Vasella, will be covered in Sect. 2.2.1 and ester enolates derived from 3-deoxy-2-ketoulosonic acids (sialic acid and KDO derivatives), which bear a structural similarity to 2-deoxy pyranosides, will be covered in Sect. 4.4. Deprotonation of anomeric phenylsulfones has been discussed in Sect. 2.1.1 and additional transformations on closely related compounds are presented in Scheme 14 [20]. Alkylation of phenylsulfone 54 with epoxide 55 provides adduct 56 which eliminates benzenesulfinic acid at room temperature to give the C(l)-alkylated glycal 57 a similar elimination is also observed with adducts derived from... 

COOCjHs Wr-4-SO.-Q-CH, Na DMSO 25 10 2-Ethyl-3-methyl-2-( 4-methyl-phenylsulfon-yl)-3-nitro-... 59 83-84... 

CN H5C, i S02-<>CH3 Na DMF -20 5 2-EthyI-3-melhyl-2-( 4-methyl-phenylsulfon-yl) -3-nitro-butan- sdure-nitril 65 84-85... 

Research Focus Single-step synthesis of poly((4-phenylsulfonic acid)-1,2,4-triazole)-c >-oxadiazole containing at least 85% polytriazole. 

---