6102. Methyl p-Nitrobenzenesulfonate
Nomenclature
CAS number: 6214-20-6
p-Nitrobenzenesulfonic acid methyl ester. C7H7NO5S; mol wt 217.20.
C 38.71%, H 3.25%, N 6.45%, O 36.83%, S 14.76%.
Description and references
Reagent for selective methylation of cysteine residues in chemical modification of proteins: Nakagawa, Bender, J. Am. Chem. Soc. 91, 1566 (1969). Procedure: Heinrikson, Biochem. Biophys. Res. Commun. 41, 967 (1970). Prepd by the general method of reacting p-nitrobenzenesulfonyl chloride with alcohols. See Morgan, Cretcher, J. Am. Chem. Soc. 70, 375 (1948).
