Sodium Carbonate → Tert-butyl 4-(adamantan-1-ylmethoxy)-fluoro-5-vinylbenzoate

Temperatur

100 °C

A mixture of tert-butyl 4-(adamantan-1-ylmethoxy)-5-chloro-2-fluorobenzoate (2.00 g, 5.06 mmol), vinylboronic acid pinacol ester (1.56 g, 10.1 mmol) and sodium carbonate (1.61 g, 15.2 mmol) in dioxane (20 mL) and water (5 mL) was bubbled with a nitrogen atmosphere for 10 min, tributylphosphine tetrafluoroborate (0.15 g, 0.51 mmol), tris(dibenzylideneacetone)dipalladium(0) (0.023 g, 0.025 mmol) was added to this reaction mixture. The reaction mixture was heated to 100° C. for 24 h and then cooled to ambient temperature. Water (50 mL) was added and the mixture extracted with ethyl acetate (100 mL×3), the combined organics were washed with brine; dried over anhydrous sodium sulfate and concentrated in vacuo. The residue was purified over column chromatography, eluting with 30% dichloromethane in hexanes to give the crude product, which was used for next step without further purification: MS (ES+) m/z 398.3 (M+1).

1. customwas bubbled with a nitrogen atmosphere for 10 min
2. temperaturecooled to ambient temperature
3. extractionthe mixture extracted with ethyl acetate (100 mL×3)
4. washthe combined organics were washed with brine
5. dry with materialdried over anhydrous sodium sulfate
6. concentrationconcentrated in vacuo
7. customThe residue was purified over column chromatography
8. washeluting with 30% dichloromethane in hexanes

ORD-Eintrag

ord-3d58a6dd81a64e7793603905a081e44f

Quelldatensatz

uspto-grants-2015_01

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08933236B2