4-Methoxy-2,6-dimethylbenzenesulphonyl (Mds): a New Protecting Group of the Guanidino Function in Peptide Synthesis
The 4-methoxy-2,6-dimethylbenzenesulphonyl (Mds) group for the protection of the guanidino function, which is readily removed with trifluoroacetic acid-thioanisole but is resistant to hydrogenolysis or treatment with dilute hydrogen chloride, can be used in the solution synthesis of arginine-containing peptides; this protecting group was effectively used in the synthesis of substance P and two LH-RH analogues.