Diisopropylethylamine → (S)-N-(1-benzylpiperidin-3-yl)-N-methyl-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine

Participants

Reaction Conditions

Reaction Steps

To a solution of (S)-1-benzyl-N-methylpiperidin-3-amine (500 mg, 2.4 mmol) and 4-chloro-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazolo[3,4-d]pyrimidine (697 mg, 2.4 mmol) in DMF (10 mL), DIEA (1.26 g, 9.7 mmol) was added and the reaction mixture was stirred at 60° C. overnight. After reaction was completed as indicated by TLC, the reaction mixture was diluted with EtOAc (40 mL) and was washed with water (3×20 mL). The EtOAc layer was then dried over Na2SO4 and evaporated in vacuo to give a residue that was purified by column chromatography (silica gel, gradient EtOAc in hexanes) to afford the titled intermediate (550 mg, 49%). 1H NMR (400 MHz, CD3OD): δ 8.26 (s, 1H), 8.15 (bs, 1H), 7.32 (m, 3H), 7.22 (m, 2H), 5.67 (s, 2H), 3.61 (t, J=9.2 Hz, 2H), 3.57 (m, 2H), 3.31 (s, 3H), 2.95 (m, 2H), 2.24 (m, 1H), 2.03 (m, 2H), 1.80 (m, 4H), 0.86 (m, 2H), 0.07 (s, 9H). LC-MS: m/z [M+1]=453.

Provenance & Evidence