反应详情

A solution of 17β-cyclopropyloxy-4-nitroandrost-4-en-3-one (1.0 g, 2.71 mM), either prepared above or by other known techniques, in acetic acid (10 ml) is treated with zinc dust (1.0 g). The combination (mixture) is vigorously stirred for 1.5 hours at room temperature. The zinc salts are removed by filtration and washed with ethyl acetate. The combined filtrate and wash are combined and concentrated to a yellow solid which is then redissolved in ethyl acetate and extracted three times with 1M hydrochloric acid (150 ml), The combined acid extracts are neutralized with sodium hydroxide (pH 14) and extracted with ether. The combined organic layers are then dried over sodium sulfate and concentrated to give 4-amino-17-cyclopropyloxyandrost-4-en-3-one (0.59 g), m.p. 100°-102° C. (aqueous methanol).

1. customThe zinc salts are removed by filtration
2. washwashed with ethyl acetate
3. washThe combined filtrate and wash
4. concentrationconcentrated to a yellow solid which
5. dissolutionis then redissolved in ethyl acetate
6. extractionextracted three times with 1M hydrochloric acid (150 ml)
7. extractionextracted with ether
8. dry with materialThe combined organic layers are then dried over sodium sulfate
9. concentrationconcentrated