N-bromobutanimide → Ethyl 1-(4-amino-3-bromo-5-(2,2,2-trifluoroethoxy)phenyl)cyclopentanecarboxylate

To a stirred solution of ethyl 1-(4-amino-3-(2,2,2-trifluoroethoxy)phenyl)cyclopentanecarboxylate (1.2 g, 4.0 mmol) in dry CCl4 (60 mL), NBS (0.427 g, 3.2 mmol) was added at 0° C. The reaction mixture was allowed to stir for 3 h at room temperature. The reaction mixture was diluted with water, extracted with DCM (2×50 mL), the combined organic solvents was dried over Na2SO4, filtered and concentrated under reduced pressure. The crude reaction mixture was purified by column chromatography to give ethyl 1-(4-amino-3-bromo-5-(2,2,2-trifluoroethoxy)phenyl)cyclopentanecarboxylate (920 mg) as a yellow solid.

1. extractionextracted with DCM (2×50 mL)
2. dry with materialthe combined organic solvents was dried over Na2SO4
3. filtrationfiltered
4. concentrationconcentrated under reduced pressure
5. customThe crude reaction mixture
6. customwas purified by column chromatography

ORD-Eintrag

ord-f36083ba6cda4923a4b9aa22b92a8ed5

Quelldatensatz

uspto-grants-2012_07

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08217064B2