Reacción #825

Ecuación de reacción

Fc1ccc(C(F)(F)F)cc1I

COc1nc(N)ncc1Br

→

COc1nc(Nc2cc(C(F)(F)

Rendimiento 84.9%

Disolventes

Cc1ccccc1

Condiciones de reacción

Procedimiento

To a microwave vial was added a mixture of 5-bromo-4-methoxypyrimidin-2-amine (0.520 g, 2.55 mmol), diacetoxypalladium (0.059 g, 0.26 mmol), (9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphine) (151.8 mg, 0.26 mmol), 1-fluoro-2-iodo-4-(trifluoromethyl)benzene (0.89 g, 3.07 mmol) and toluene (17 mL) under inert atmosphare. The reaction mixture was sealed and heated at 90 °C under 16h. The LCMS indicated a complete conversion of the SM. The reaction mixture was partitioned between ethyl acetate and NH4Cl-solution. The organic layer was washed with NH4Cl-solution, brine dried over sodium sulphate, filtered and concentrated in vacuum to give a yellow gum. The oil dissolved in dichloromethane charged on silica 100g and purified by flash chromatography eluting with Ethyl acetate (0-80)% in heptane giving the product 5-bromo-N-(2-fluoro-5-(trifluoromethyl)phenyl)-4-methoxypyrimidin-2-amine (792 mg, 85 %) as a white solid. Collected at 260 nm 1H NMR (500 MHz, DMSO) d 3.93 (s, 3H), 7.49 (td, 2H), 8.29 - 8.35 (m, 1H), 8.40 (s, 1H), 9.60 (s, 1H). Expected Number of Hs: 8 Assigned Hs: 8.

Fuente