alkline solution;

hydrogen; palladium on activated charcoal in methanol 24 h;

trimethylsilyl trifluoromethanesulfonate; methyl-phenyl-thioether in trifluoroacetic acid T=0°C; 1 h; New peptide deprotection procedure: hard-soft acid-base concept; the role of soft bases (thioanisole, dimethylsulfide, diphenylsulfide) employed.; Product distribution;