Sodium Carbonate → (2R)-2-({Formyl[(phenylmethyl)oxy]amino}methyl)hexanoic acid

Participants

Reaction Steps

To a solution of 1H-1,2,3-benzotriazole-1-carbaldehyde (26 g, 0.18 mol) in THF (200 ml) at 0° C. was added dropwise a solution of (2R)-2-({[(phenylmethyl)oxy]amino}methyl)hexanoic acid (8) (40 g, 0.16 mol) in THF (200 mL). The reaction mixture was warmed up to rt and stirred overnight. LC/MS indicated completion of the reaction. To the reaction mixture at 0° C. was added water (400 mL), Na2CO3 (36 g), and Boc2O (43.6 g, 0.36 mol). The mixture was stirred for 3 h. THF was removed under vacuum. The aqueous mixture was washed with ether and then acidified to pH ˜2.0 with acetic acid, and extracted with ethyl acetate. The extracts were dried and concentrated to provide the title compound (36.8 g, 80%). LCMS: (M+H)+: 280.2.

Provenance & Evidence