Acetic Acid → Gon-4-en-3-one, 13-ethyl-17-hydroxy-, (17beta)-(+-)-

反応式

[BH4-].[Na+].[CH2:3]([C@:5]12[CH2:13][CH2:12][C@@H:11]3[C@@H:14]4[C:19]([CH2:20][CH2:21][C@H:10]3[C@@H:9]1[CH2:8][CH2:7][C:6]2=[O:23])=[CH:18][C:17](=[O:22])[CH2:16][CH2:15]4)[CH3:4].C(O)(=O)C>C(O)C>[CH2:3]([C@:5]12[CH2:13][CH2:12][C@@H:11]3[C@@H:14]4[C:19]([CH2:20][CH2:21][C@H:10]3[C@@H:9]1[CH2:8][CH2:7][C@@H:6]2[OH:23])=[CH:18][C:17](=[O:22])[CH2:16][CH2:15]4)[CH3:4]

参加物

実験手順

Add sodium borohydride (200 mg.) in ethanol (25 cc.) to 13β-ethyl-gon-4-en-3,17-dione (1 g.) in ethanol (50 cc.) at 8°. After 15 minutes add an excess of acetic acid and evaporate the solution to dryness under reduced pressure. Add water, collect the product in ether, and after this work up in the usual manner, recrystallize from a mixture of ether and pentane to obtain 13β-ethyl-17β-hydroxy-gon-4-en-3-one; ultraviolet absorption peak at 240 mμ (ε15,500); infrared absorption peaks at 2.94, 6.06, 6.23.