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Dicyclohexylcarbodiimide → 3-(3-Pyridyl)-1-propyl N-(tert-butyloxycarbonyl)pyrrolidine-2-carboxylate
関与物質
| 役割 | 名称 | HCID | 仕込み量 |
|---|---|---|---|
| 反応物 | Dicyclohexylcarbodiimide | HCID 10868 | — |
| 反応物 | 3-Pyridinepropanol | HCID 17861 | — |
| 反応物 | Bicyclo[2.2.1]heptane-1-methanesulfonic acid, 7,7-dimethyl-2-oxo-, (1S)- | HCID 18462 | — |
| 反応物 | 1,2-Pyrrolidinedicarboxylic acid, 1-(1,1-dimethylethyl) ester, (2S)- | HCID 85083 | — |
| 触媒 | 4-(Dimethylamino)pyridine | HCID 14284 | — |
| 溶媒 | Dichloromethane | HCID 6344 | — |
| 生成物 | 3-(3-Pyridyl)-1-propyl N-(tert-butyloxycarbonyl)pyrrolidine-2-carboxylate | HCID 53885642 | 53.4% |
反応手順
A mixture of N-(tert-butyloxycarbonyl)-(S)-proline (6.0 g; 28 mmol); 3-(3-pyridyl)-1-propanol (5.80 g; 41.8 mmol), dicyclohexylcarbodiimide (9.20 g; 44.48 mmol), camphorsulfonic acid (21.60 g; 9.26 mmol) and 4-dimethylaminopyridine (1.12 g; 9.26 mmol) in dry methylene chloride (200 mL) was stirred overnight. The reaction mixture was filtered through Celite, concentrated, and purified on a silica gel column eluting with 40% ethyl acetate in hexane to obtain 5.0 g of the product as a clear oil (53%), 1H NMR (300 MHz, CDCl3): δ1.42 (s, 9H); 1.43-1.95 (m, 6H); 2.68 (m, 2H); 3.46-3.52 (m, 2H); 4.11-4.22 (m, 2H); 4.33 (m, 1H); 7.17 -7.24 (m, 1H); 7.47 (m, 1H); 8.43 (s, 2H).
情報源と証拠
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| 特許番号 | US05721256 |
| 出典データセット | uspto-grants-1998_02 |
| ORD ID | ord-79c8aaa9316544fca84a93e86476dc45 |
| 出典メモ | uspto-grants-1998_02 |