反应详情

DIPEA (0.26 mL, 1.5 mmol) was added to a solution of 3-[(1-methylethyl)oxy]-5-[(4-methyl-5-oxo-2,3,4,5-tetrahydro-1,4-benzoxazepin-8-yl)oxy]benzoic acid (185 mg, 0.5 mmol), 1,1-dimethylethyl 3-amino-1H-pyrazole-1-carboxylate (110 mg, 0.6 mmol) and HATU (247 mg, 0.65 mmol) in DMF (2 mL) and the mixture stirred at RT for 16 hours. The mixture was poured onto water (30 mL), extracted with ethyl acetate (3×15 mL), the combined organic extracts washed with 1N citric acid, saturated sodium hydrogen carbonate, brine, dried (MgSO4) and evaporated in vacuo. The residue was chromatographed on silica, eluting with 60% ethyl acetate in isohexane, to give the desired compound (32 mg). 1H NMR δ (CDCl3): 1.3 (d, 6H), 1.55 (s, 9H), 3.15 (s, 3H), 3.5 (t, 2H), 4.3 (t, 2H), 4.5 (m, 1H), 6.5 (s, 1H), 6.7 (m, 2H), 7.1 (d, 1H), 7.8 (d, 1H), 7.95 (d, 1H), 8.7 (s, 1H); m/z 535 (M−H)−

1. additionThe mixture was poured onto water (30 mL)
2. extractionextracted with ethyl acetate (3×15 mL)
3. washthe combined organic extracts washed with 1N citric acid, saturated sodium hydrogen carbonate, brine
4. dry with materialdried (MgSO4)
5. customevaporated in vacuo
6. customThe residue was chromatographed on silica
7. washeluting with 60% ethyl acetate in isohexane