Trifluoroacetic acid → 2-(3-Fluoro-5-(piperidin-4-ylidenemethyl)phenoxy)-5-(trifluoromethyl)pyridine

To a solution of tert-butyl 4-(3-fluoro-5-(5-(trifluoromethyl)pyridin-2-yloxy)benzylidene)piperidine-1-carboxylate (585 mg, 0.001 mol) in dry CH2Cl2 (7 mL) cooled to 0° C. was added trifluoroacetic acid (0.99 mL, 0.012 mol). The reaction mixture was stirred for 30 min at 0° C. and then for 1 h at RT. The reaction mixture was quenched with saturated aqueous NaHCO3 and extracted with CH2Cl2 three times. The organic layer was washed with brine, dried over Na2SO4 and evaporated to dryness to give the title compound (469 mg, 100%). 1H NMR (500 MHz, CDCl3): δ 9.82 (m, 1H), 8.43 (s, 1H), 7.95 (d, J=8 Hz, 1H), 7.07 (d, J=9 Hz, 1H), 6.83 (q, J=13.5 Hz, 2H), 6.43 (s, 1H), 3.29 (s, 1H), 3.17 (s, 1H), 2.85 (m, 1H), 2.72 (s, 1H).

1. waitfor 1 h at RT
2. customThe reaction mixture was quenched with saturated aqueous NaHCO3
3. extractionextracted with CH2Cl2 three times
4. washThe organic layer was washed with brine
5. dry with materialdried over Na2SO4
6. customevaporated to dryness

ORD-Eintrag

ord-17961cbca92c4b4d9c93df434e84396b

Quelldatensatz

uspto-grants-2011_10

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08044052B2