Aniline → 4-methoxy-N-phenylpyrimidin-2-amine

Temperature

100 °C

In a sealed tube was 2-chloro-4-methoxypyrimidine (1.00 g, 6.92 mmol) in 2-propanol (5 mL). Aniline (0.757 mL, 8.30 mmol) and DIEA (1.45 mL, 8.30 mmol) were added and the reaction mixture was stirred at 100° C. until the reaction was complete by HPLC. The reaction mixture was cooled to room temperature. The resulting thick suspension was filtered, washed with ethanol, collected and dried under vacuum to yield the desired product (0.164 g) as a white solid. The filtrate was concentrated and then partitioned between EtOAc and saturated aqueous NaCl. The phases were separated, and the aqueous phase was re-extracted with EtOAc (1×). The combined organic layers were dried (Na2SO4), filtered and concentrated to yield a yellow solid. The crude product was purified by flash column chromatography, eluting with 25:1 dichloromethane/EtOAc. The desired product (0.548 g) was obtained as a white solid, which was combined with the filtered product to yield 0.712 g (51%) total desired product. 1H NMR (400 MHz, DMSO-d6) δ 9.51 (s, 1H), 8.20 (d, J=5.5 Hz, 1H), 7.77 (d, J=7.8 Hz, 2H), 7.27 (t, J=8.0 Hz, 2H), 6.94 (t, J=7.4 Hz, 1H), 6.28 (d, J=5.5 Hz, 1H), 3.91 (s, 3H). LRMS (ESI pos) m/e 202 (M+1).

1. customIn a sealed tube was
2. temperatureThe reaction mixture was cooled to room temperature
3. filtrationThe resulting thick suspension was filtered
4. washwashed with ethanol
5. customcollected
6. customdried under vacuum

ORD record

ord-b33ebf947b5f40168fb5dfb9fcd5d0be

Source dataset

uspto-grants-2010_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07723330B2