Ethylmorpholine → FMOC-N-Me-Ser(O-Bzl)-Tyr-D-Leu-OEt

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of Tyr-D-Leu-OEt hydrochloride (1.649 g) in DMF (10 ml) cooled to 0° C. was added N ethylmorpholine (0.59 ml) in DMF (1 ml), followed by a solution of FMOC-N-Me-Ser(O-Bzl)-OH (2.18 g) in DMF (5 ml), followed by a solution of HOBt (0.9315 g) in DMF (5 ml), and followed by a solution of DCC (0.947 g) in DMF (2 ml). The reaction solution was stirred at 0° C. for 1 hour and then at room temperature for 4 hours. The solvent was removed in vacuo and the residue was purified by silica gel column chromatography eluting with (95:5) methylene chloride:methanol. The product was obtained as a semisolid. Rf 0.35. Fab Mass spec. m/e 736 (M+ +H).

Provenance & Evidence