Phenyl isocyanate → PhNHCO-Leu-DTrp-betaAla-OEt

Participants

Reaction Steps

To a solution of Leu-DTrp-βAla-OEt.TFA (40.6 mg) obtained in Example 51-(1) in chloroform (2 ml) were added TEA (20 μl) and phenyl isocyanate (15 μl) at room temperature under nitrogen. The reaction mixture was stirred for 1 h, and concentrated under reduced pressure. The residue was purified by dry column flash chromatography (Merck, Kieselgel 60) with chloroform/methanol=10/1 for elution to give the product (39.6 mg).

Provenance & Evidence