Acetoxyacetic acid → HCID 91188657, compound

Participants

Reaction Steps

To (1S,2R,4aS,5R,8R,8aR)-2,8a-dihydroxy-3,8-dimethyl-5-(1-methylethenyl)-1, 2,4a,5,6,7,8,8a-octahydronaphthalen-1-yl (2S,3aR,9bR)-6-chloro-9b-hydroxy-5-methyl-1,2,3,3a,5,9b-hexahydropyrrolo[2,3-c][2,1]benzoxazine-2-carboxylate (Preparation 139, 210 mg, 0.4 mmol) and 4-dimethylaminopyridine (65 mg, 0.53 mmol) in dichloromethane (10 ml) was added (acetyloxy)acetic acid (60 mg, 0.51 mmol) and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (90 mg, 0.58 mmol). The resultant mixture was stirred at room temperature and upon completion was concentrated in vacuo. The crude product was purified by chromatography on a Biotage® 12M column eluting with hexane:ethyl acetate (2:1). The pure fractions were combined and the solvent removed in vacuo to give the title product (150 mg, 61%).

Provenance & Evidence