関与物質
| 役割 | 名称 | HCID | 仕込み量 |
|---|
| 反応物 | Cesium carbonate | HCID 10796 | — |
| 反応物 | Tris(1,1-dimethylethyl)phosphine | HCID 83681 | — |
| 反応物 | 2-Bromo-5-chlorotoluene | HCID 84476 | — |
| 反応物 | tert-Butyl piperazine-1-carboxylate | HCID 143452 | — |
| 触媒 | Tris(dibenzylideneacetone) dipalladium | HCID 9832798 | — |
| 溶媒 | Toluene | HCID 1140 | — |
| 生成物 | Tert-butyl 4-(4-chloro-2-methylphenyl)piperazine-1-carboxylate | HCID 66757902 | 20% |
反応手順
2-Bromo-5-chlorotoluene (0.82 g, 4 mmol) and tert-Butyl 1-piperazine carboxylate (0.89 g, 2.32 mmol) were added to a solution of tri-t-butyl phosphine (0.033 g, 4 mmol %), tris(dibenzylideneacetone) dipalladium(0) (0.075 g, 2.0 mmol %) and cesium carbonate (1.95 g, 6.0 mmol) in toluene and heated to 80° C. overnight. The reaction mixture was filtered through celite and concentrated in vacuo. The crude product was purified on silica gel (gradient elution from 20% ethyl acetate/hexane to 50% ethyl acetate/hexane) to give the title compound in 20% yield. ESI-MS m/z: 311 (M+1), UV retention time: 3.49 min.
情報源と証拠
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|
| 特許番号 | US08653096B2 |
|---|
| 出典データセット | uspto-grants-2014_02 |
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| ORD ID | ord-785768d0ce444ce3800805bba17139b8 |
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| 出典メモ | uspto-grants-2014_02 |
|---|
