Aniline → N-phenyl-3-(quinolin-2-yl)aniline

Aniline (2.75 g, 29.6 mmol), 2-(3-chlorophenyl)quinoline (5.25 g, 21.90 mmol), sodium tert-butoxide (3.36 g, 35.0 mmol), Pd2dba3 (0.501 g, 0.548 mmol) and 2-dicyclohexylphosphino-2′,6′-dimethoxybephenyl (S-Phos) (0.898 g, 2.190 mmol) were charged into the reaction flask with 200 mL of toluene. This mixture was evacuated and back-filled with nitrogen then was heated at reflux for 20 h. The reaction mixture was cooled to room temperature then was diluted with 200 mL of water. The toluene layer was separated and the aqueous was extracted with 100 mL of toluene. The organic extracts were combined and removed under vacuum. The crude residue was passed through a silica gel column using 75% DCM/hexanes then was passed through a silica gel column using 1-5% ethyl acetate/DCM. The clean product fractions were combined and solvents were removed under vacuum yielding N-phenyl-3-(quinolin-2-yl)aniline (3 g, 10.12 mmol, 46.2% yield).

1. customThis mixture was evacuated
2. additionback-filled with nitrogen
3. temperaturethen was heated
4. temperatureat reflux for 20 h
5. additionthen was diluted with 200 mL of water
6. customThe toluene layer was separated
7. extractionthe aqueous was extracted with 100 mL of toluene
8. customremoved under vacuum
9. customsolvents were removed under vacuum

ORD record

ord-05307e51ba364c18b088796e4bc09239

Source dataset

uspto-grants-2014_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08871361B2