Hydrochloric Acid → 13-Ethylgon-4-ene-3,17-dione
反応式
[CH2:1]([C@:3]12[CH2:11][CH2:10][C@@H:9]3[C:12]4[CH2:13][CH:14]=[C:15]([O:20]C)[CH2:16][C:17]=4[CH2:18][CH2:19][C@H:8]3[C@@H:7]1[CH2:6][CH2:5][C:4]2=[O:22])[CH3:2].Cl>CO>[CH2:1]([C@:3]12[CH2:11][CH2:10][C@@H:9]3[C@@H:12]4[C:17]([CH2:18][CH2:19][C@H:8]3[C@@H:7]1[CH2:6][CH2:5][C:4]2=[O:22])=[CH:16][C:15](=[O:20])[CH2:14][CH2:13]4)[CH3:2]参加物
4
実験手順
Treat dl-13-ethyl-3-methoxygona-2,5(10)-dien-17-one with hydrochloric acid in aqueous methanol to obtain dl-13-ethylgon-4-ene-3,17-dione (25.6, 54% from dl-13-ethyl-3-methoxygona-2,5(10)-dien-17β-ol), m.p. 156°-157.5°; ultraviolet absorption peak in 95% ethanol at 240.5 mμ (15,900), infrared maxima (potassium bromide) at 5.77 μ, 5.98 μ. Recrystallize dl-13-ethylgon-4-ene-3,17-dione (1.0 g) three times from ethyl acetate to obtain 484 mg., 157°-159.5°; ultraviolet absorption peak (95% ethanol) at 240 mμ (ε17,200), infrared maxima (potassium bromide) at 5.77 μ, 5.98 μ.