Diisopropylethylamine → (R)-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 (R)-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) was added DIEA (1.26 g, 9.7 mmol) and the reaction mixture was stirred at 60° C. overnight. The reaction mixture was diluted with EtOAc (40 mL) and was washed with water (3×20 mL). The EtOAc layer was 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, CDCl3): δ 8.37 (s, 1H), 7.98 (s, 1H), 7.34-7.20 (m, 5H), 5.71 (s, 2H), 3.62 (t, J=8.0 Hz, 2H), 3.55 (m, 2H), 3.24 (s, 3H), 2.91 (m, 2H), 2.17 (m, 1H), 1.99 (m, 2H), 1.79 (m, 2H), 1.41 (m, 1H), 1.27 (m, 1H), 0.92 (t, J=8.0 Hz, 2H), −0.054 (s, 9H). LC-MS: m/z [M+1]=453.

Provenance & Evidence