Citric Acid → HCID 59749206, compound

Participants

Reaction Steps

The compound (1.1 g) obtained in Example 321 (2) was dissolved in tetrahydrofuran (20 ml), and thereto was added portionwise sodium hydride (410 mg, 60% dispersion in oil) in several portions under nitrogen atmosphere in an ice bath, and the mixture was stirred for 30 minutes. To the reaction mixture was added ethyl bromoacetate (0.45 ml), and the mixture was warmed to room temperature, and then stirred for 6 hours. The reaction mixture was poured into a 5% aqueous citric acid solution under ice-cooling, and the mixture was extracted with ethyl acetate. The organic layer was washed with a saturated brine, dried over sodium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography [n-hexane:ethyl acetate (8:2)] to give the title compound (980 mg) as colorless oil. (2) [2-((tert-Butoxycarbonyl){3-[2-[(4-chloro-2-methoxyphenyl)imino]-4-(4-fluorophenyl)thiazol-3(2H)-yl]propyl}amino)ethoxy]acetic Acid

Provenance & Evidence