Potassium Carbonate → HCID 86691194, Verbindung

A solution of tert-butyl (trans)-2-(6-bromopyridin-3-yl)cyclopropylcarbamate (Intermediate J[a2]) (100 mg, 0.32 mmol), potassium carbonate (132 mg, 0.96 mmol) and 3-trifluoromethylbenzeneboronic acid (72 mg, 0.38 mmol) in CH3CN:H2O (4:1) (10 mL) was degassed for 30 mins, added tetrakis triphenylphosphine palladium (37 mg, 0.032 mmol), degassed for 10 mins and heated the reaction mixture at reflux temperature for 2 h. After completion, the reaction mixture was poured in ice water (100 mL), extracted with ethyl acetate (5×40 mL). The combined extract were washed with water (70 mL), brine (70 mL), dried over anhydrous Na2SO4, filtered and evaporated. The crude residue was purified by column chromatography (SiO2), by using EtOAc:Petroleum ether (1:9) to get tert-butyl (trans)-2-(6-(3-(trifluoromethyl)phenyl)pyridin-3-yl)cyclopropylcarbamate (70 mg, 58.3%) as a white solid.

1. customdegassed for 10 mins
2. temperatureheated the reaction mixture
3. temperatureat reflux temperature for 2 h
4. additionAfter completion, the reaction mixture was poured in ice water (100 mL)
5. extractionextracted with ethyl acetate (5×40 mL)
6. extractionThe combined extract
7. washwere washed with water (70 mL), brine (70 mL)
8. dry with materialdried over anhydrous Na2SO4
9. filtrationfiltered
10. customevaporated
11. customThe crude residue was purified by column chromatography (SiO2)

ORD-Eintrag

ord-6aaa35cb040d496684cfc9ab09e26116

Quelldatensatz

uspto-grants-2015_04

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09006449B2