6-Nitro-1-β-napthalenesulfonyloxybenzotriazole : A novel coupling reagent for peptide synthesis
作者:Balekudru Devadas、Bijoy Kundu、Alka Srivastava、Krishna B Mathur
DOI:10.1016/0040-4039(93)85069-9
日期:1993.10
Synthesis of 6-nitro-1-β-napthalenesulfonyloxybenzotriazole (N-NSBt) and its application as a peptidecouplingreagent is being reported. It has been found to be suitable for rapid and quantitative synthesis of optically pure peptides in a stepwise manner.
The acetone-initiated photochemical alkylation of protected glycylglycine, glycylalanine, and glycyl-leucine dipeptide methyl esters with isobutene, but-1-ene, and toluene is described. The reactions lead to the preferential conversion of the glycine residue to leucine, norleucine, or phenylalanine, respectively, in yields of up to 60%. A free-radical chain mechanism is proposed for these reactions