[CH2:1]([C@:3]1([OH:23])[CH2:8][CH2:7][C@H:6]2[C:9]3[CH2:10][CH2:11][C:12]4[CH:13]=[C:14]([O:21][CH3:22])[CH:15]=[CH:16][C:17]=4[C:18]=3[CH2:19][CH2:20][C@:4]12[CH3:5])[CH3:2].[Li].N.[Cl-].[NH4+]>O1CCCC1.NC1C=CC=CC=1.O>[CH3:2][CH2:1][C:3]1([OH:23])[C:4]2([CH3:5])[CH2:20][CH2:19][CH:18]3[C:17]4[CH:16]=[CH:15][C:14]([O:21][CH3:22])=[CH:13][C:12]=4[CH2:11][CH2:10][CH:9]3[CH:6]2[CH2:7][CH2:8]1Add dl-17α-ethyl-3-methoxyestra-1,3,5(10),8-tetraen-17-ol (3 g) in tetrahydrofuran (50 ml) to lithium (0.8 g) in aniline (8 ml) and liquid ammonia (200 ml). Stir for two hours, decompose by adding ammonium chloride and water, and extract with ether. Wash, dry and evaporate the organic extract, and crystallize from ethyl acetate-hexane to obtain dl-17α-ethyl-3-methoxyestra-1,3,5(10)-trien-17β-ol (2 g), m.p. 133°--135°; ultraviolet absorption maximum at 279 mμ (ε2,120).
Wird geladen…