Isatoic Anhydride → 7-(2-Methoxyethoxy)-4-(2-methyl-3-(4-oxoquinazolin-3(4H)-yl)phenyl)-9H-pyrido[3,4-b]indole-1-carboxamide

온도

95 °C

A mixture of 4-(3-amino-2-methylphenyl)-7-(2-methoxyethoxy)-9H-pyrido[3,4-b]indole-1-carboxamide (330 mg, 0.845 mmol), 1H-benzo[d][1,3]oxazine-2,4-dione (345 mg, 2.113 mmol), trimethoxymethane (0.926 mL, 8.45 mmol), and tris(nitrooxy)lanthanum, 6H2O (110 mg, 0.254 mmol) in tetrahydrofuran (Volume: 2 mL) was heated at 95° C. in a sealed vial for 20 hr. The mixture was diluted with ethyl acetate (100 mL), washed with water (30 mL), 1 N NaOH solution (30 mL), and brine (30 mL). The organic solution was dried over anhydrous MgSO4 and concentrated under vacuum. The residue was subjected to prep. reverse phase HPLC purification. The correct fractions were concentrated under vacuum, basified with saturated NaHCO3 solution, and extracted with ethyl acetate (3×35 mL). The combined extract was washed with brine (30 mL) and dried over anhydrous MgSO4. Removal of solvent under vacuum provided the desired product (188 mg, 0.362 mmol, 42.8% yield) as a yellow solid. The product is mixture of two atropisomers at rt. LCMS (M+H)+=520.29. 1H NMR (500 MHz, DMSO-d6) (recognizable peaks for the major atropisomer) δ: 11.68 (s, 1H), 8.44 (s, 1H), 8.21 (s, 1H), 7.36 (s, 1H), 7.25 (d, J=8.9 Hz), 4.17 (m, 2H), 3.73 (m, 2H), 3.35 (s, 3H), 1.81 (s, 3H).

1. washwashed with water (30 mL), 1 N NaOH solution (30 mL), and brine (30 mL)
2. dry with materialThe organic solution was dried over anhydrous MgSO4
3. concentrationconcentrated under vacuum
4. customphase HPLC purification
5. concentrationThe correct fractions were concentrated under vacuum
6. extractionextracted with ethyl acetate (3×35 mL)
7. extractionThe combined extract
8. washwas washed with brine (30 mL)
9. dry with materialdried over anhydrous MgSO4
10. customRemoval of solvent under vacuum

ORD 기록

ord-0d55febccf824e379f932f1a9d35bd72

출처 데이터셋

uspto-grants-2014_04

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US08685969B2