Ethylmorpholine → HCID 54434155, compound

Participants

Reaction Steps

A solution of asparaginyl-phenylalanyl-phenylalanine methyl ester trifluoroacetate (0.88 g, 1.59 mmole, described by H. U. Immer et al., U.S. Pat. No. 3,917,578, issued Nov. 4, 1975), t-butoxycarbonyl-glycine trichlorophenyl ester (0.56 g, 1.59 mmole) and N-ethylmorpholine (0.203 ml, 1.59 mmole) in dimethylformamide (9 ml) is stirred at 0° C. for 1 hour and at 25° C. for 20 hours. The solution is evaporated and the residue is crystallized from methanol to give the title compound, mp 211°-214° C.

Provenance & Evidence