関与物質
| 役割 | 名称 | HCID | 仕込み量 |
|---|
| 反応物 | Water | HCID 962 | — |
| 反応物 | Diisopropylethylamine | HCID 81531 | — |
| 反応物 | 3-Bromoimidazo(1,2-b)pyridazine | HCID 12872319 | — |
| 反応物 | tert-Butyl 3-ethynylpiperidine-1-carboxylate | HCID 21963855 | — |
| 触媒 | Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI) | HCID 24350 | — |
| 触媒 | HCID 178418476 | HCID 178418476 | — |
| 溶媒 | Dimethylformamide | HCID 6228 | — |
| 生成物 | 1-BOC-3-(2-(imidazo[1,2-b]pyridazin-3-yl)ethynyl)piperidine | HCID 86709565 | 60% |
反応手順
A solution of 3-bromoimidazo[1,2-b]pyridazine (0.40 g, 2 mmol), 1-BOC-3-ethynylpiperidine (0.55 g, 2.6 mmol), Pd(PPh3)2Cl2 (70 mg, 0.1 mmol), CuI (29 mg, 0.15 mmol), and DIPEA (0.39 g, 3 mmol) in DMF (20 mL) was stirred at 80° C. under Are for 6 hrs. The mixture was poured into 100 mL water, extracted with EtOAc (60 mL×3), organic layer was washed with brine, dried with Na2SO4, filtered, and the filtrate was evaporated in vacuo. The crude product was purified by chromatography on silica gel (PE/EtOAc 7:3 to 3:2) to give 0.39 g product as yellow oil (60.0%). 1H NMR (300 MHz, CDCl3) δ: 8.50 (1H, d, J=4.2 Hz), 7.98-8.08 (2H, m), 7.13-7.17 (1H, dd, J=4.5 and 8.7 Hz), 4.09 (1H, brs), 3.76-3.82 (1H, m), 3.19 (1H, brs), 3.02-3.09 (1H, m), 2.81-2.88 (1H, m), 2.32 (1H, brs), 2.11-2.15 (1H, m), 1.67-1.81 (2H, m), 1.46 (9H, s). LCMS: m/z [M+H]+ 327.2112.
情報源と証拠
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|
| 特許番号 | US08859553B2 |
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| 出典データセット | uspto-grants-2014_10 |
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| ORD ID | ord-44c6b74b35764271b0e35c358e10b47d |
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| 出典メモ | uspto-grants-2014_10 |
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