17,17-Ethylenedioxy-1,3,5(10)-estratrien-3β-ol (I) was converted into ethyl ester II by reaction with ethyl chloroacetate in the presence of potassium. The ethyl ester II on reaction with hydrazine gave hydrazide III, which on condensation with aromatic aldehydes gave Schiff bases IVa-IVd. The reaction of Schiff bases IVa-IVd with chloroacetyl chloride in the presence of triethylamine afforded β-lactams Va-Vd.
17,17-乙二氧基-1,3,5(10)-雌三烯-3β-醇(I)通过与氯乙酸乙酯在钾存在下反应转化为乙酸乙酯II。乙酸乙酯II与肼反应生成肼III,肼III与芳香醛缩合生成席夫碱IVa-IVd。席夫碱IVa-IVd与氯乙酰氯在三乙胺存在下反应得到β-内酰胺Va-Vd。