Diisopropylethylamine → 3-[6-(7-Cyclopentyl-6-dimethylcarbamoyl-7H-pyrrolo[2,3-d]pyrimidin-2-ylamino)-pyridine-3-carbonyl]-3,8-diaza-bicyclo[3.2.1]octane-8-carboxylic acid tert-butyl ester

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Reaction Steps

To a solution of 6-(7-cyclopentyl-6-(dimethylcarbamoyl)-7H-pyrrolo[2,3-d]pyrimidin-2-ylamino)nicotinic acid (400 mg, 1.01 mmol) in DMF (5 mL) was added O-(benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (HBTU, 580 mg, 1.53 mmol, 1.5 equiv) and N,N-diisopropylethylamine (0.55 mL, 3.0 equiv) and the resulting mixture stirred at room temperature for 5 minutes. To the reaction mixture was added 3,8-Diaza-bicyclo[3.2.1]octane-8-carboxylic acid Pert-butyl ester (250 mg, 1.18 mmol. 1.1 eq). The resulting mixture was stirred at room temperature for 30 minutes. The reaction mixture was diluted in EtOAc, washed with 0.5M HCl, water, dried over Na2SO4, filtered and concentrated. Material was immediately used in next step without further purification. MS: (M+H)=589.7

Provenance & Evidence