Dichloromethane → L-methionine, N-[1-(2-(biphenyl-4-yl)-2-oxoethyl)-L-prolyl] benzylamide

Participants

Reaction Steps

A solution of N-[2-(biphenyl-4-yl)-2-oxoethyl] L-proline (54 mg, 0.17 mmol, 1.0 eq), N-ethylmorpholine (133 uL, 1.04 mmol, 6 eq) in acetonitrile (0.5 mL) was cooled to 0° C. and treated with a 50% solution of 1-n-propylphosphonic acid cyclic anhydride in dichloromethane (180 uL, 0.27 mmol, 1.6 eq) followed by the L-methionine benzylamide (71.36 mg, 0.30 mmol, 1.7 eq). Purification by HPLC provided 35 mg (38%) of L-methionine, N-[1-(2-(biphenyl-4-yl)-2-oxoethyl)-L-prolyl] benzylamide.

Provenance & Evidence