反应详情

(S)-2-Amino-N,N-dimethyl-3-phenyl-propionamide hydrochloride (2.0 mmol) and 5-chloro-1H-benzoimidazole-2-carboxylic acid (Crowther et al., J. Chem. Soc. 1949, p.1268, 2.0 mmol) were coupled according to Procedure A and the product purified by chromatography on silica gel eluted with 1:1 ethyl acetate-hexanes (235 mg, 63%): HPLC (60/40) 4.92 min (91%); PBMS 371/373 (MH+, 100%); 1H NMR (CDCl3) δ11.25 (br, 0.6H), 10.9 (br, 0.4H), 8.36 (m, 1H), 7.78 (d, 0.4H, J=7.72 (d, 0.6H, J=8.8 Hz), 7.52 (d, 0.6H, J=2 Hz), 7.41 (d, 0.4H, J=8.4 Hz), 7.35-7.1 (m, 6H), 7.35 (m, 1H), 3.16 (m, 2H), 2.90 (s, 3H), 2.68 (s, ca. 2H), 2.67 (s, ca. 1H).

1. customthe product purified by chromatography on silica gel
2. washeluted with 1:1 ethyl acetate-hexanes (235 mg, 63%)
3. custom(60/40) 4.92 min (91%)