6-Hydroximino-4-androstene-3,17-dione → (6E,8R,9S,10R,13S,14S)-6-hydroxyimino-10,13-dimethyl-3-[(3S)-pyrrolidin-3-yl]oxyimino-1,2,7,8,9,11,12,14,15,16-decahydrocyclopenta[a]phenanthren-17-one

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Reaction Steps

The title compound I-dw was obtained following the procedure described in Example 100 and starting from 6-(E)-hydroxyiminoandrost-4-ene-3,17-dione (II-bw, Prepn. 63, 200 mg) and 3-(S)-pyrrolidinyloxyamine dihydrochloride (III-d, Prepn. 4) (110 mg). The crude product (1/1 ratio of the E/Z isomers) was purified by flash chromatography (SiO2, CH2Cl2/MeOH/26% NH4OH 90/10/1). The less polar fractions were evaporated to dryness to give the title compound I-dw in 65% yield. 1H-NMR (300 MHz, DMSO-d6, ppm from TMS): δ 10.72 (1H, bs), 6.16 (1H, bs), 4.69 (1H, m), 3.36-3.10 (7H, m), 2.60-1.10 (16H, m), 0.96 (3H, s), 0.83 (3H, s).

Provenance & Evidence