Hydrochloric Acid → 2-(methylsulfanyl)-3-[4-(2,2,2-trifluoroethoxy)phenyl]pyrido[2,3-d]pyrimidine-4,7(3H,8H)-dione

Temperature

120 °C

7-Methoxy-2-(methylsulfanyl)-3-[4-(2,2,2-trifluoroethoxy)phenyl]pyrido[2,3-d]pyrimidin-4(3H)-one (1.55 g) and pyridine hydrochloride (3.1 g) were added to N,N-dimethylformamide (20 ml), and the mixture was stirred at 120° C. for 2 hr, and allowed to be cooled. The reaction mixture was poured into 0.5M hydrochloric acid (22 ml), and the white precipitate was collected by filtration, washed with water, and dissolved in tetrahydrofuran (30 ml). The solution was diluted with ethyl acetate (60 ml), dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The obtained residue was washed with ethyl acetate to give the title compound (1.33 g) as a white solid.

1. temperatureto be cooled
2. filtrationthe white precipitate was collected by filtration
3. washwashed with water
4. dissolutiondissolved in tetrahydrofuran (30 ml)
5. additionThe solution was diluted with ethyl acetate (60 ml)
6. dry with materialdried over anhydrous magnesium sulfate
7. concentrationconcentrated under reduced pressure
8. washThe obtained residue was washed with ethyl acetate

ORD record

ord-5928e5b72fd54d14a0e8d60415b13f9a

Source dataset

uspto-grants-2015_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09023858B2