Hydrochloric Acid → n-(4-Chloro-2-(2-fluoro-6-methoxybenzoyl)phenyl)benzamide

Temperature

-78 °C

To a solution of 1-fluoro-3-methoxy-benzene (19.6 g, 155 mmol) in THF (180 mL), at −78° C., was added dropwise 2.5 M n-butyllithium in hexanes (62 mL, 155 mmol). The solution was stirred at −78° C. for 3 h and then added to a suspension of 6-chloro-2-phenyl-benzo[d][1,3]oxazin-4-one (38.8 g, 150 mmol) in THF (280 mL) at −20° C. The mixture was allowed to gradually warm until the solution became homogenous. 1N HCl (150 mL) followed by EtOAc (250 mL) were then added and the solution allowed to warm to room temperature. The organic portion was collected and washed with H2O (250 mL), saturated NaHCO3 (2×250 mL) and H2O (250 mL). The organic portion was then dried over Na2SO4 and evaporated to dryness, in vacuo, to provide the N-[4-Chloro-2-(2-fluoro-6-methoxy-benzoyl)-phenyl]-benzamide as an orange solid (42.7 g). To a solution of N-[4-Chloro-2-(2-fluoro-6-methoxy-benzoyl)-phenyl]-benzamide (42.7 g, 110 mmol) in MeOH (540 mL) was added KOH (56.4 g, 1 mole) in H2O (100 mL). The solution was allowed to reflux for 16 h. The solution was then allowed to cool to room temperature and the resulting precipitate removed by filtration. The filtrate was concentrated in vacuo, diluted with EtOAc (250 mL) and washed with H2O (3×100 mL). The organic portion was then dried over Na2SO4, concentrated in vacuo and then purified by column chromatography (silica gel, 0 to 15% EtOAc/hexanes) to provide 1ac (19.6 g, 47%) MS m/z=280 (M+H).

1. temperatureto gradually warm until the solution
2. additionwere then added
3. temperatureto warm to room temperature
4. customThe organic portion was collected
5. washwashed with H2O (250 mL), saturated NaHCO3 (2×250 mL) and H2O (250 mL)
6. dry with materialThe organic portion was then dried over Na2SO4
7. customevaporated to dryness, in vacuo

ORD record

ord-3a139fafcb35474a91ebe99650f9a8e9

Source dataset

uspto-grants-2013_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08399659B2