Hydrochloric Acid → 2-Amino-4'-fluorobenzophenone

온도

-78 °C

A solution of 4-bromofluorobenzene (1 eq.) in THF was cooled to −78° C. under nitrogen and treated with tert-butyllithium (2.05 eq., 1.6 M solution in pentane) at a rate of 40 ml/h. The internal temperature did not rise above −74° C. The orange solution was stirred at −78° C. for 30 minutes prior to the addition of anthranilonitrile (0.6 eq.) as a solution in THF. The reaction was warmed to 0° C. and stirred for 2 hours. 3N HCl was added to the mixture and stirring continued for 30 minutes. The reaction was diluted with ethyl acetate and the layers were separated. The aqueous layer was back-extracted thrice with ethyl acetate. The combined extracts were washed with brine, dried over Na2SO4, filtered, and concentrated. The residue was purified via HPLC eluting with 93:7 hexanes/ethyl acetate.

1. customdid not rise above −74° C
2. temperatureThe reaction was warmed to 0° C.
3. stirringstirred for 2 hours
4. stirringstirring
5. waitcontinued for 30 minutes
6. customthe layers were separated
7. extractionThe aqueous layer was back-extracted thrice with ethyl acetate
8. washThe combined extracts were washed with brine
9. dry with materialdried over Na2SO4
10. filtrationfiltered
11. concentrationconcentrated
12. customThe residue was purified via HPLC
13. washeluting with 93:7 hexanes/ethyl acetate

ORD 기록

ord-b8d76b83df764b17b38850a4e0b8b51e

출처 데이터셋

uspto-grants-2008_06

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US07390801B2