6-Methoxy-3-pyridinylamine → 5-chloro-N-(6-methoxypyridin-3-yl)-3-(2-methyl-9-(tetrahydro-2H-pyran-2-yl)-9H-purin-6-yl)pyridin-2-amine

Participants

Reaction Steps

A solution of 6-methoxypyridin-3-amine (0.357 g, 2.88 mmol) (Source: Aldrich) in THF (10 mL) was treated with lithium bis(trimethylsilyl)amide (5.03 mL, 5.03 mmol) (Source: Aldrich) and the mixture was stirred under an inert atmosphere for 20 minutes. Then 6-(5-chloro-2-fluoropyridin-3-yl)-2-methyl-9-(tetrahydro-2H-pyran-2-yl)-9H-purine (0.500 g, 1.438 mmol) was added to the mixture and the mixture was stirred overnight. The reaction mixture was diluted with DCM and brine solution. The organic layer was collected by extracting the aqueous layer with DCM (3×20 mL). The combined organic layers were dried over sodium sulfate, filtered and concentrated in vacuo. The crude was purified by ISCO Silica-Gel Chromatography, Teledyne ISCO, Lincoln, Nebr., (120 gram column), using a gradient of 10-60% EtOAc/DCM over 37 minutes. The fractions with desired material were combined and concentrated to give 5-chloro-N-(6-methoxypyridin-3-yl)-3-(2-methyl-9-(tetrahydro-2H-pyran-2-yl)-9H-purin-6-yl)pyridin-2-amine (0.590 g, 1.306 mmol, 91% yield) as a yellow solid. m/z (ESI, +ve) 452 (M+H)+. 1H NMR (400 MHz, CDCl3) δ 9.76 (s, 1H); 8.40 (s, 1H); 8.23 (s, 1H); 8.16 (s, 2H); 7.19 (s, 1H); 6.75 (d, J=8.80 Hz, 1H); 5.80 (d, 1H); 4.14 (d, 1H); 3.91 (s, 4H); 3.76 (t, 1H); 2.83 (s, 3H); 1.46-2.25 (m, 5H).

Provenance & Evidence