Hydrochloric Acid → 13-Ethylgon-4-ene-3,17-dione

Beteiligte Stoffe

Reaktionsschritte

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.

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