反应详情

To a solution of 0.65 g of hydroxylamine hydrochloride in 41 ml of 1N NaOH and 30 ml of dioxane a solution of 2.70 g of (E)-3β,14β-dihydroxy-5β-pregn-20-ene-21-carboxaldehyde (Fullerton D. S. et al., J. Med. Chem., 1976, 19,1330) in 40 ml of dioxane was added dropwise at room temperature. After 20 hrs the solution was diluted with water and extracted with methylene chloride. The crude product was purified by flash chromatography (SiO2) using hexane/ethyl acetate 1/1 as the eluant. The fractions containing the title compound were collected and evaporated to dryness. The residue was ground with di-iso-propyl ether to give 1.80 g of the title compound (I-am), as a white solid.

1. extractionextracted with methylene chloride
2. customThe crude product was purified by flash chromatography (SiO2)
3. additionThe fractions containing the title compound
4. customwere collected
5. customevaporated to dryness