Synthesis of methyl 2- and 4-pyridyl disulfide from 2- and 4-thiopyridone and methyl methanethiosulfonate.

T M Kitson, K M Loomes

Index: Anal. Biochem. 146(2) , 429-30, (1985)

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Abstract

In 1982, methyl 2-pyridyl disulfide was reported as a new reagent for the titration of thiol groups in peptides and proteins and for their temporary blocking with the thiomethyl group [T. Kimura et al. (1982) Anal. Biochem. 122, 274-282]. We have synthesized this compound (and its 4-pyridyl isomer) by a rapid and convenient procedure which is preferable to that in the original report. Our method involves the thiomethylation of the appropriate thiopyridone by methyl methanethiosulfonate.