Imidazole → HCID 57260927, compound

Participants

Reaction Steps

To a stirred solution of the FR-900506 substance (89.7 mg) in dichloromethane (3 ml) were added imidazole (118 mg) and tert-butyl-diphenylsilyl chloride (52.2 mg). After the reaction mixture was stirred at room temperature or 2 hours, the reaction mixture was diluted with a saturated aqueous ammonium chloride and extracted three times with diethyl ether. The extract was washed with water and an aqueous sodium chloride, dried over sodium sulfate, and then concentrated under reduced pressure. The residue was purified on silica gel column chromatography (developing solvent: ethyl acetate and hexane, 1:3 v/v) to give 17-allyl-12-[2-(4-tert-butyl-diphenylsilyloxy-3-methoxycyclohexyl)-1-methylvinyl]-1,14-dihydroxy-23,25-dimethoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1.04,9 ]octacos-18-ene-2,3,10,16-tetraone (107 mg).

Provenance & Evidence