Decanoyl chloride → (8R,9S,10R,13S,14S,17S)-13-ethyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl decanoate

참여 물질

반응 단계

Add decanoyl chloride (1.9 g.) to 13β-ethyl-17β-hydroxy-gon-4-en-3-one (1.3 g.) in pyridine (12.5 cc.) and allow the mixture to stand at room temperature overnight. Pour the mixture in 2N hydrochloric acid and extract with ether. Wash, dry and evaporate the extracts and recrystallize the residue from benzene-hexane to give the title compound (1.0 g.), m.p. 97°-97.5°; ultraviolet absorption peak at 239 mμ (ε16,500); infrared absorption peaks at 5.74; 5.99, 6.17 μ.

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