反应详情

(S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(2-(4-ethoxyphenyl)-1H-indol-3-yl)propanoic acid (1.11 g, 66%) was obtained from (S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(1H-indol-3-yl)propanoic acid and 1-iodo-4-ethoxybenzene using the procedure described for (S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(2-(3-methoxyphenyl)-1H-indol-3-yl)propanoic acid. 1H NMR (400 MHz, chloroform-d) δ 8.12 (s, 1H), 7.77 (d, J=7.5 Hz, 2H), 7.69 (d, J=7.8 Hz, 1H), 7.54-7.34 (m, 8H), 7.33-7.12 (m, 4H), 6.97-6.90 (m, 2H), 5.16 (d, J=7.8 Hz, 1H), 4.64 (d, J=6.3 Hz, 1H), 4.28-4.06 (m, 4H), 3.62-3.42 (m, 2H), 1.44-1.36 (t, J=8.0 Hz, 3H); [α]20D −10.68° (4.01 mg/mL, MeOH). LCMS retention time=1.898 min., m/z 547=(M+H), 98.2% purity. The LCMS data was obtained on a Shimadzu analytical LC/MICROMASS® Platform LC (ESI+) at 220 nm using The following set of conditions: PHENOMENEX® Luna 3 μm C18, 2×50 mm column, with a gradient of 0-100% B (B=90% HPLC grade acetonitrile/0.1% trifluoroacetic acid/10% HPLC grade water), (A=90% HPLC grade water/0.1% trifluoroacetic acid/10% HPLC grade acetonitrile), in 2 minutes with a 1 minute hold at a flow rate of 1 mL/minute.