Trifluoroacetic acid → 3,5-Dimethylpyridin-2-amine

Temperatur

50 °C

3,5-dimethyl-N-(2,4,4-trimethylpentan-2-yl)pyridin-2-amine (6.5 g, 27.7 mmol) was mixed with 2,2,2-trifluoroacetic acid (46 mL, 621 mmol) and heated to 50° C. for 4.5 hours. The mixture was concentrated in vacuo then diluted with dichloromethane (10 mL) and water (10 mL). The layers were partioned and aqueous phase was neutralised to pH 7-8 using saturated bicarbonate solution. The product was then extracted with dichloromethane (3×10 mL) and the organics were dried using a phase separator cartridge. The solvent was evaporated in vacuo to give the title compound (2.99 g) as a white solid. LCMS (2 min, High pH) Rt 0.69 min, m/z (ES+) 123 (M+H).

1. concentrationThe mixture was concentrated in vacuo
2. additionthen diluted with dichloromethane (10 mL) and water (10 mL)
3. extractionThe product was then extracted with dichloromethane (3×10 mL)
4. customthe organics were dried
5. customThe solvent was evaporated in vacuo

ORD-Eintrag

ord-12402a79e13f45a6ba7c3ba17809153d

Quelldatensatz

uspto-grants-2016_01

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09242972B2