1,1'-Carbonyldiimidazole → HCID 86614043, compound

Participants

Reaction Steps

To (1S,2R,4aS,5S,8R,8aR)-2-(acetyloxy)-8a-hydroxy-5-[2-hydroxy-1-methylethyl]-3,8-dimethyl-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 140, 0.30 g, 0.52 mmol) in dichloromethane was added 1,1′-carbonyldiimidazole (0.92 g, 0.57 mmol) and the reaction mixture was stirred for 18 h. The reaction mixture was diluted with water and extracted with dichloromethane. The organic extracts were washed with brine, dried and then concentrated in vacuo. The crude product was purified by flash chromatography eluting with ethyl acetate:hexane (2:1) to give the title compound (0.16 g, 46%).

Provenance & Evidence