反応式
[H-].[Al+3].[Li+].[H-].[H-].[H-].[CH3:7][C@:8]12[CH2:25][CH2:24][C@H:23]3[C@@H:13]([CH2:14][CH2:15][C:16]4[C@:21]3([CH3:22])[CH2:20][CH2:19][C:18](=[O:26])[CH:17]=4)[C@@H:12]1[CH2:11][CH2:10][C@@H:9]2[C:27](OC)=[O:28]>C1COCC1>[OH:28][CH2:27][C@H:9]1[CH2:10][CH2:11][C@H:12]2[C@H:13]3[C@H:23]([CH2:24][CH2:25][C@:8]12[CH3:7])[C@:21]1([CH3:22])[C:16](=[CH:17][CH:18]([OH:26])[CH2:19][CH2:20]1)[CH2:15][CH2:14]3参加物
反応条件
- 温度
- 0 °C
実験手順
Approximately 750 ml of dry THF was added to a 3-neck round bottom flask equipped with a condenser, argon bubbler and mechanical stirrer. The flask was cooled to 0° C. and lithium aluminum hydride (LAH) (11.39 g, 0.3 mol) was slowly added. After all of the LAH was added, the flask was warmed to room temperature. A solution of methyl androst-4-ene-3-one-17β-carboxylate (66 g, 0.2 mol) in 600 ml of THF was very slowly added to the LAH slurry. After the addition of the steroid, the reaction mixture was slowly warmed to reflux. After 2 hours the excess LAH was quenched with 11.4 ml water, 11.4 ml 15% sodium hydroxide (NaOH) and 2B ml water. The salts were removed by filtration and washed with approximately 1 liter of warm THF. Concentration of the combined organic solutions afforded 63 g (94%) of 17β-(hydroxymethyl)-androst-4-ene-3-ol as mixture of α and β isomers.
後処理
- customequipped with a condenser
- temperaturethe flask was warmed to room temperature
- temperaturethe reaction mixture was slowly warmed to reflux
- customAfter 2 hours the excess LAH was quenched with 11.4 ml water, 11.4 ml 15% sodium hydroxide (NaOH) and 2B ml water
- customThe salts were removed by filtration
- washwashed with approximately 1 liter of warm THF
出典と根拠
- ORDレコード
- ord-73ff28221b8441fd948980209a899f52
- 出典データセット
- uspto-grants-1991_05
- 特許番号
- US05017568
関連ノート
読み込み中…