HCID 13371411, compound → HCID 13371413, compound

Participants

Reaction Steps

To a solution of 4-fluoroestra-1,3,5(10)-trien-17β-ol (100 mg, 0.36 mmol) in 1.5 ml of acetone at 0° C. was added, dropwise with stirring, a solution of 95 ml of 8N chromium trioxide in 8N sulfuric acid. After approximately 5 min. the reaction mixture was poured into 75 ml of ice water and the solids were collected. The filter cake was stirred with methanol. The inorganic salts were removed and the filtrate was evaporated to dryness to give the crude product, 4-fluoroestra-1,3,5-(10)-trien-17-one as a tan solid. The latter was crystallized from ether-petroleum ether (30°-60°) as a colorless solid (60 mg, 61% yield), mp 139°-141° C. Ir (KBr)cm-1 1724 (C17C=O), 1230 (aryl fluoride); 1H NMR δ 7.21-6.81 (m, 3, H1, H2, H3 aromatic) 2.91-1.54 (m, 15), 0.92 (s, 3, C18CH3).

Provenance & Evidence