Hydrochloric Acid → HCID 86598960, compound

Participants

Reaction Steps

To a solution of [4′-[2-[(tert-butoxycarbonyl)[(2R)-2-hydroxy-2-phenylethyl]amino]ethyl]-3-(cyclohexyloxy)-4-biphenylyl]acetic acid (228 mg) in N,N-dimethylformamide (2.5 ml) was added 1,1′-carbonyldiimidazole (77 mg) at room temperature under nitrogen, and the mixture was stirred at the same temperature for 1.5 hours. To this one were added methanesulfonamide (76 mg) and 1,8-diazabicyclo[5.4.0]-7-undecene (91 mg) at 5° C., and the mixture was stirred at the same temperature for 5 hours. The resulting mixture was poured into 1N hydrochloric acid and the aqueous layer was extracted with ethyl acetate. The organic layer was washed successively with 1N hydrochloric acid (twice) and brine, dried over anhydrous magnesium sulfate and evaporated under reduced pressure. The residue was purified by column chromatography on silica gel (chloroform/ethyl acetate=10:1 to 5:1) to give tert-butyl [2-(3′-(cyclohexyloxy)-4′-[2-[(methylsulfonyl)amino]-2-oxoethyl]-4-biphenylyl]ethyl]-[(2R)-2-hydroxy-2-phenylethyl]carbamate (61 mg).

Provenance & Evidence