反应详情

To a solution of 1-((S)-1-(5-chloropyridin-2-yl)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-2-phenylethyl)-3-((1S,2R)-2-hydroxycyclopentyl)urea (16 mg, 0.028 mmol) in THF (1 mL) was added NaH (11 mg, 60% in mineral oil, 0.28 mmol). t-Butyl acrylate (18 mg, 0.14 mmol) was added after 1 min and the reaction mixture stirred at ambient temperature for 16 h. The reaction mixture was concentrated in vacuo and purified by preparative HPLC Shimadzu-Phenomenex Luna C18 column, 21.2×100 mm eluting with 10-100% CH3CN (90% in H2O, 0.1% TFA) gradient over 15 min with flow rate 20 mL/min and UV detection at 220 nm to give 3-((1R,2S)-2-(3-((S)-1-(5-chloropyridin-2-yl)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-2-phenylethyl)ureido)cyclopentyloxy)propanoic acid at the retention time of 8.74 min (1.2 mg, 6% yield) and tert-butyl 3-((1R,2S)-2-(3-((S)-1-(5-chloropyridin-2-yl)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-2-phenylethyl)ureido)cyclopentyloxy)propanoate at a retention time of 11.32 min (2.5 mg, 14% yield).

1. concentrationThe reaction mixture was concentrated in vacuo
2. custompurified by preparative HPLC Shimadzu-Phenomenex Luna C18 column, 21.2×100 mm
3. washeluting with 10-100% CH3CN (90% in H2O, 0.1% TFA) gradient over 15 min with flow rate 20 mL/min and UV detection at 220 nm