反应详情

4-(tert-Butoxycarbonylamino)-1-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)piperidine-4-carboxylic acid (Intermediate 1) (362 mg), 1-(4-chlorophenyl)ethanamine (172 mg), N-(3-dimethylaminopropyl)-3-ethylcarbodiimide (231 mg) and 1-hydroxybenzotriazole (163 mg) were stirred together in DMF (2 mL) under nitrogen for 16 hours. The reaction mixture was partitioned between EtOAc (20 mL) and brine (4×20 mL). The organics were combined, dried over MgSO4 and evaporated in vacuo. The resultant white solid was dissolved in 1,4-dioxane (5 mL) and a 4M solution of HCl in 1,4-dioxane (5 mL) was added. The resulting mixture was stirred for 16 hours, then diluted with diethyl ether (50 mL). The crude product was isolated by filtration as the HCl salt which was purified by ion exchange chromatography, using an SCX column. The desired product was eluted from the column using 7M ammonia/MeOH and pure fractions were evaporated to dryness. This material was purified by preparative LCMS using decreasingly polar mixtures of water (containing 1% NH3) and MeCN as eluents. Fractions containing the desired compound were evaporated to dryness to afford 4-amino-N-(1-(4-chlorophenyl)ethyl)-1-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)piperidine-4-carboxamide as a white solid (168 mg, 42%). 1H NMR (d6-dmso, 400 MHz) 1.33-1.49 (m, 5H), 1.84-2.04 (m, 2H), 2.12-2.22 (br s, 2H), 3.54 (t, 2H), 4.39 (t, 2H), 4.81-4.92 (m, 1H), 6.55-6.59 (m, 1H), 7.13-7.18 (m, 1H), 7.31-7.39 (m, 4H), 8.12 (s, 1H), 8.30 (d, 1H), 11.62 (s, 1H).

1. customThe reaction mixture was partitioned between EtOAc (20 mL) and brine (4×20 mL)
2. dry with materialdried over MgSO4
3. customevaporated in vacuo
4. dissolutionThe resultant white solid was dissolved in 1,4-dioxane (5 mL)
5. additiona 4M solution of HCl in 1,4-dioxane (5 mL) was added
6. additiondiluted with diethyl ether (50 mL)