Triethylamine → L-phenylalanine, N-[1-(2-adamantan-1-yl-2-oxoethyl)-L-prolyl] benzylamide

Participants

Reaction Conditions

Reaction Steps

Using the procedure described previously, a solution of 1-(2-adamantan-1-yl-2-oxoethyl) L-proline (100 mg, 0.34 mmol, 1.0 eq), L-phenylalanine N-benzylamide (175 mg, 686 umol, 2.0 eq) and dichloromethane (1.0 mL), was cooled to 0° C., and treated with triethylamine (286 uL, 2.0 mmol, 6.0 eq). To this chilled solution was added a 50% solution of 1-n-propylphosphonic acid cyclic anhydride in dichloromethane (436 uL, 0.68 mL, 2.0 eq). When TLC indicated the reaction was complete, the solution was allowed to warm to 22° C., washed with satd aq NaHCO3, concentrated in vacuo, and purified by flash chromatography to provide 144 mg (80%) of L-phenylalanine, N-[1-(2-adamantan-1-yl-2-oxoethyl)-L-prolyl] benzylamide.

Provenance & Evidence