Dimethyl sulphoxide phenols

The laboratory preparation of the Udel-type polymer has been described. Bis-phenol A is mixed with chlorobenzene (solvent) and dimethyl sulphoxide (active solvent) and heated to 60°C to obtain a clear solution. Air is displaced from the system by nitrogen or argon and an aqueous solution of caustic soda added. This results in a two-phase system, one predominantly chlorobenzene the... 

Dihydrodithiin sulphoxides, synthesis of 243 Dihydrothiophene dioxides, reactions of 653 /(,/( -Dihydroxyketones 619 Dimerization, photochemical 877, 884 Dimethyl sulphoxide anion of - see Dimsyl anion hydrogen bonding with alcohols and phenols 546-552 oxidation of 981, 988 photolysis of 873, 874, 988 radiolysis of 890-909, 1054, 1055 self-association of 544-546 Dimsyl anion... 

Petroleum ether with aniline, benzyl alcohol, dimethyl formamide, dimethyl sulphoxide, formamide, furfuryl alcohol, phenol or water. 

Aryl monothiolcarbonates have been obtained in 60% yield from a potassium phenolate in dioxan/dimethyl sulphoxide and carbon oxysulphide during 3 hours at ambient temperature foliowed by alkylation with a primary halide (PrI) as shown (ref.23). 

The reagent was prepared by treating thionyl chloride dropwise in dichloromethane at -60° under nitrogen with dimethyl sulphoxide in dichloromethane. After stirring (20 mins.), phenol in dichloromethane was added at -50°, stirring continued for 40 mins, (at -50°), triethylamine in CHjClj added dropwise at -50° to -40°, mixture allowed to reach ambient temp, and poured into IM HCl. 

Tetrachloro-l,4-benzoquinone, a carcinogenic metabolite of the wood-preservative pentachloro-phenol, when incubated with the spin-trapping agent 5,5-dimethyl-l-pyrroline N-oxide (DMPO) and H2O2 produced the DMPO/HO adduct (Zhu etal. 2002). The formation of DMPO/HO was markedly inhibited by the HO scavenging agents dimethyl sulphoxide (DMSO), ethanol, formate, and azide, with the concomitant formation of the characteristic DMPO spin trapping adducts with CHj, CH(CH3)0H, COO", and Nj, respectively. 

Formation of hydrogen bonds between phenols and naphthols on the one hand, and dimethyl, divinyl, diphenyl sulphoxides and other sulphinyl or sulphonyl derivatives on the other, have also been documented in the literature95-97. 

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