Methane sulfinic acid

For methyl phenyl sulfoxide it was found that 25% of the adduct decomposes to give phenyl radical and methane sulfinic acid, while 75% of the adduct leads to methyl radical and benzene sulfinic acid. For heavier alkyl groups the formation of the benzene sulfinic acid is even more dominant, 96% for R = Et and 100% for R = C2H4C1 or i-Pr. 

Questions are still asked about the role of DMS, which is sometimes seen, along with DMSP as having an antioxidant function in marine algae because the breakdown products of DMSP (i.e., DMS, acrylate, dimethylsulfoxide, and methane sulfinic acid) readily scavenge hydroxyl... 

Dimethyl sulfoxide has been measured in the atmosphere and laboratory studies indicate that in the atmosphere this compound will be rapidly oxidized by reaction with the OH radical. The oxidation of DMSO remains a subject of continued investigation. In the atmosphere, DMSO may be converted into dimethyl sulfone, SO2, or methane sulfinic acid. 

The branching of the adduct decomposition was studied by measuring the pKa of the mixtures. Thus for pulse radiolysis of N20-saturated methyl phenyl sulfoxide the results yield a p/Ca obs value of 1.50 while the values for methane sulfinic and benzene sulfinic acids are 2.28 and 1.29, respectively. The fraction of each branch can be calculated from the equation,... 

Rhodococcus sp. Strain T09 A Rhodococcus strain T09 was isolated by enrichment on media-containing BT. The desulfurization mechanism of this organism was reported to be similar to Gordonia sp. 213E due to the observation of similar intermediates however, the substrate specificity was different. The strain T09 could use 2-methyl, 3-methyl and 5-methyl BT apart from BT as sole source of sulfur for growth, but not 7-methyl or ethyl derivatives. Additionally, it could also use methyl thiobenzothiazole, marcaptobenzothiazole, as well as benzene sulfide, benzene sulfonate, biphenyl sulfinate, dimethyl sulfate, dimethyl sulfone, dimethyl sulfide, methane sulfonic acid, thiophene, and taurine as sole sulfur sources. However, it could not grow on DBT or DBT sulfone. 

Methanesulfonic acid added to an ice-cooled soln. of 5-benzyloxy-l,2-epoxy-4-hydroxy-3-methylhexyl N,N-diisopropylcarbamate in methanol, the mixture stirred at 20-5° for 15 h, and treated with triethylamine methyl 5-0-benzyl-3,6-dideoxy-3-C-methyl-P-L-allofuranoside. Y 84%. F.e.s. D. Hoppe et al.. Synthesis 1989, 83-8 preparation of C- and C-labelled methane-sulfonic and -sulfinic acid s. V.J. Feil et al., J. Labelled Compds. Radiopharm. 25, 1021-5 (1988). 

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