Ethanolamine → L-Isoleucine

Participants

Reaction Steps

A -5° C. solution of L-isoleucine, N-[1-(carboxymethyl)-L-prolyl] benzylamide (0.215 g, 0.58 mmol, 1.0 eq), and triethylamine (96 uL, 70 mg, 0.64 mmol, 1.20 eq), in acetonitrile (10 mL) was treated with isobutyl chloroformate (83 uL, 86 mg, 0.63 mmol, 1.1 eq) followed by 2-aminoethanol (69 uL, 70 mg, 1.15 mmol, 2.0 eq). Workup as above provided 127 mg (53%) of L-isoleucine, N-[1-(2-(2-hydroxyethylamine)-2-oxoethyl)-L-prolyl] benzylamide.

Provenance & Evidence