DL-norvaline → HCID 178458956, compound

Participants

Reaction Steps

To 92.4 g (0.646 moles) of 3-oximino-2,4-hexanedione dissolved in 807 ml of n-butanol was added 90.75 g (0.775 moles) of d,l-norvaline. The mixture was refluxed 6.25 h, then cooled and concentrated in vacuo. The residue was taken up in ethyl acetate (500 ml), suction filtered and the filtrate washed with 10% aqueous sodium hydroxide (4×100 ml). Removal of the solvent in vacuo gave 0.29 moles (48% yield based on recovered amino acid) of 4-methyl-5-propinoyl-2-propylimidazole and 5-acetyl-4-methyl-2-propylimidazole (87:13 respectively).

Provenance & Evidence