Hydrochloric Acid → HCID 15852636, compound

Temperature

-50 °C

To a stirred mixture of 1-methoxynaphthalene (20.0 g, 126.6 mmol) in THF (100 mL) was added n-butyllithium (53.16 mL, 132.9 mmol, 2.5M solution in hexanes) at room temperature over 5 min. The reaction mixture was cooled to −50° C., and triisopropyl borate (43.8 mL, 35.7 g, 190 mmol) was added dropwise over 0.25 h. The resulting precipitate was broken up by the addition of THF (100 mL), and the mixture was allowed to warm to 0° C. with stirring. At this point the mixture was poured into 1N HCl (100 mL), the product extracted with ethyl acetate, the combined extracts dried over anhydrous sodium sulfate, and filtered. After concentrating the filtrate in vacuo at ambient temperature, the residue was partially dissolved in diethyl ether, triturated with hexane, and the resulting precipitate filtered and washed with hexane to afford 10.64 g (41%) of the title compound 1-methoxynaphthalene-2-boronic acid as an off-white crystalline solid (MW 202.02, C11H11BO3).

1. temperatureto warm to 0° C.
2. extractionthe product extracted with ethyl acetate
3. dry with materialthe combined extracts dried over anhydrous sodium sulfate
4. filtrationfiltered
5. concentrationAfter concentrating the filtrate in vacuo at ambient temperature
6. dissolutionthe residue was partially dissolved in diethyl ether
7. customtriturated with hexane
8. filtrationthe resulting precipitate filtered
9. washwashed with hexane

ORD record

ord-dbb368808a18456cb2293c1c7db88475

Source dataset

uspto-grants-2006_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06992100B2