Methyl p-Nitrobenzenesulfonate
Title: Methyl p-Nitrobenzenesulfonate
CAS Registry Number: 6214-20-6
CAS Name: p-Nitrobenzenesulfonic acid methyl ester
Molecular Formula: C7H7NO5S
Molecular Weight: 217.20
Percent Composition: C 38.71%, H 3.25%, N 6.45%, O 36.83%, S 14.76%
Literature 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).
Properties: White to cream crystals, mp 93-95°.
Melting point: mp 93-95°
Use: Methylating agent.

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