Hydrochloric Acid → (6alpha-Fluoro-11beta-hydroxy-3,20-dioxo-16alpha-methyl-1,4-pregnadien-21-yl) hydrogen succinate

Beteiligte Stoffe

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Reaktionsschritte

Five grams of 6α-fluoro-11β,21 -dihydroxy-16α-methyl-1,4-pregnadiene-3,20-dione is refluxed in 25 ml. of pyridine with 5 g. of succinic acid anhydride for 2 hours. After cooling to 20°C., the solution is stirred into ice water, acidified with hydrochloric acid, and the thus-precipitated product is vacuumfiltered, washed with water, and dried. By recrystallization from ethyl acetate, 4.85 g. of (6α-fluoro-11β-hydroxy-3,20-dioxo-16α-methyl-1,4-pregnadien-21-yl) hydrogen succinate is obtained, m.p. 212°-214° C.

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