反应详情

To a stirred solution of 2-(3-Fluoro-phenoxy)-nicotinic acid (0.300 grams, 1.29 mmole) and NMM (0.144 grams, 1.41 mmole) in dry methylene chloride (15 ml) at −10° C. was added isobutyl chloroformate (0.193 grams, 1.41 mmole). After 20 minutes at −10° C. 2-chlorobenzylamine (0.219 grams, 1.55 mmole) was added and the mixture was allowed to warm to room temperature over night. The mixture was poured into water and extracted with ethyl acetate. The combined organics were washed with 1 N NaOH, water and brine, dried over MgSO4, filtered and concentrated to give a solid that was purified by chromatography on silica gel eluting with 30% ethyl acetate/hexane to give a white solid. Recrystalization from ethyl acetate/hexane gave a solid (0.328 g). M.P. 115-117° C.; Anal. calcd. for C19H14N2O2ClF: C, 63.96; H, 3.95; N, 7.85. Found: C, 64.04; H, 3.92; N, 7.85.

1. extractionextracted with ethyl acetate
2. washThe combined organics were washed with 1 N NaOH, water and brine
3. dry with materialdried over MgSO4
4. filtrationfiltered
5. concentrationconcentrated
6. customto give a solid
7. customthat was purified by chromatography on silica gel eluting with 30% ethyl acetate/hexane
8. customto give a white solid
9. customRecrystalization from ethyl acetate/hexane