The invention relates to a process for the preparation of 16,17-[(cyclohexylmethylene)bis(oxy)]-11,21-dihydroxypregna-1,4-diene-3,20-dione[11β,16α(R)] and similar compounds, by reaction of an appropri-ate 16,17-ketal with cyclohexanealdehyde.
本发明涉及一种制备16,17-[(环己基亚甲基)双(氧)]-11,21-双羟基孕-1,4-二烯-3,20-二酮[11β,16α(R)]及类似化合物的方法,通过将适当的16,17-环
缩酮与
环己醛反应制备。