Triethylamine → N-[(3-bromophenyl)methyl]-N'-{[1,6-diethyl-4-(tetrahydro-2H-pyran-4-ylamino)-1H-pyrazolo[3,4-b]pyridin-5-yl]methyl}-2,6-pyridinedicarboxamide

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Reaction Steps

A mixture of 6-[({[1,6-diethyl-4-(tetrahydro-2H-pyran-4-ylamino)-1H-pyrazolo[3,4-b]pyridin-5-yl]methyl}amino)carbonyl]-2-pyridinecarboxylic acid (600 mg, 1.326 mmol), 1-(3-bromophenyl)methanamine (247 mg, 1.326 mmol), HBTU (o-Benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate) (603 mg, 1.591 mmol) and Et3N (0.924 mL, 6.63 mmol) in DCM was stirred at room temperature over the weekend. The reaction was quenched with saturated NaHCO3 and extracted with DCM twice. The combined organic layers were washed with brine and then concentrated under vacuum to give a crude residue. It was then purified with flash chromatography eluting with 0 to 100% ethyl acetate in hexane (product came out at 100% ethyl acetate in hexane). The product fractions were combined to give N-[(3-bromophenyl)methyl]-N′-{[1,6-diethyl-4-(tetrahydro-2H-pyran-4-ylamino)-1H-pyrazolo[3,4-b]pyridin-5-yl]methyl}-2,6-pyridinedicarboxamide (632 mg, 49.9%). LC-MS m/z 620 (M+H)+, 0.89 min (ret time).

Provenance & Evidence