反应详情

A slurry in methanol of [4-(3-pyridyloxymethyl)-2-phenylbenzoyl]methionine methyl ester (143 mg, 0.32 mmol), prepared as in Example 234, hydroxylamine hydrochloride (26 mg, 0.37 mmol) and potassium carbonate (106 mg, 0.77 mmol) was stirred at ambient temperature for 4 hours, then a solution of potassium hydroxide in methanol (0.33 mL) was added and stirring was continued overnight at ambient temperature. The reaction mixture was filtered and the filtrate was diluted with water and taken to pH 4. The aqueous phase was extracted with 3:1 chloroform-isopropanol. The organic extract was washed with brine, dried over sodium sulfate, filtered, and concentrated in vacuo. Purification by prep HPLC gave [4-(3-pyridyloxymethyl)-2-phenylbenzoyl]methionine hydroxamic acid (92 mg). 1H NMR (300 MHz, DMSO-d6) δ 10.58 (br s, 1H), 8.58 (d, 1H), 8.40 (d, 1H), 8.33 (d, 1H), 7.80 (dd, 1H), 7.60 (dd, 1H), 7.50 (m, 3H), 7.36 (m, 5H), 5.35 (s, 2H), 4.20 (m, 1H), 2.12 (m, 2H), 1.98 (s, 3H), 1.70 (m, 2H). MS (APCI) m/e 452 (M+H)+.

1. stirringstirring
2. waitwas continued overnight at ambient temperature
3. filtrationThe reaction mixture was filtered
4. additionthe filtrate was diluted with water
5. extractionThe aqueous phase was extracted with 3:1 chloroform-isopropanol
6. extractionThe organic extract
7. washwas washed with brine
8. dry with materialdried over sodium sulfate
9. filtrationfiltered
10. concentrationconcentrated in vacuo
11. customPurification by prep HPLC