4-Methylmorpholine → N-t-butoxycarbonyl-L-tyrosylglycylglycine benzyl ester

Participants

Reaction Steps

A solution of 4.4 parts glycylglycine benzyl ester hydrochloride, 9.1 parts N-t-butoxycarbonyl-L-tyrosine 2,3,5-trichlorophenyl ester and 1.8 parts N-methylmorpholine in 150 parts methylene chloride is stirred overnight at room temperature. The solvent is then removed by evaporation under reduced pressure. The crude material is subjected to low-pressure column chromatography on silica gel to afford N-t-butoxycarbonyl-L-tyrosylglycylglycine benzyl ester.

Provenance & Evidence