反应详情

To a solution in DMF (2 mL) of 4-chloromethyl-2-(2-methylphenyl)benzoic acid methyl ester (275 mg, 1.0 mmol) was added 3-pyridinethiol potassium salt (224 mg, 1.5 mmol). The reaction mixture was stirred for 30 minutes and then was poured into water. The mixture was extracted with ethyl acetate (3×). The combined organic extracts were washed with water and brine, dried, filtered and concentrated in vacuo. Chromatography on silica gel (40% ethyl acetate-hexanes) gave 4-(3-pyridylthiomethyl)-2-(2-methylphenyl)benzoic acid methyl ester which was converted to the title compound by saponification of the methyl ester, coupling with methionine methyl ester hydrochloride, and saponification as described in Examples 319I-J. 1H NMR (300 MHz, DMSO-d6) δ 12.53 (bs, 1H), 8.49 (d, 1H), 8.38 (dd, 1H), 8.11 (d, 1H), 7.79 (dt, 1H), 7.43 (s, 2H), 7.31 (dd, 1H), 7.19 (m, 2H), 7.11 (m, 2H), 7.05 (m, 1H), 4.36 (s, 2H), 4.20 (m, 1H), 1.92-2.23 (m, 8H), 1.66-1.90 (m, 2H). MS (CI, NH3) m/e 467, 449. Anal calcd for C25H26N2O3S2: C, 64.35; H, 5.62; N, 6.00. Found: C, 64.00; H, 5.62; N, 5.89.

1. extractionThe mixture was extracted with ethyl acetate (3×)
2. washThe combined organic extracts were washed with water and brine
3. customdried
4. filtrationfiltered
5. concentrationconcentrated in vacuo