24-ethylcholest-4,22-dien-3,6-dione 在
盐酸羟胺 、
sodium acetate trihydrate 作用下,
以
乙醇 为溶剂,
以98%的产率得到(3E,6E,8S,9S,10R,13R,14S,17R)-17-((2R,5S,E)-5-ethyl-6-methylhept-3-en-2-yl)-10,13-dimethyl-1,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthrene-3,6(2H)-dione dioxime