Stereochemical structural transformations of cardiosteroids to create in them additional lactone rings were studied. Creation of δ-lactones by reaction of a 3β-OH group and a 19-carboxylic group to give the corresponding A/B-trans cardiosteroids and creation of β-lactones by reaction of a 5β-OH group and a 19-COOH to give the corresponding A/B-cis steroids were studied. The new biologically active compounds 8(14)-dehydrobovogenin-19-carboxylic acid 3β-O-19-lactone, strophanthidine-19-carboxylic acid 5β-O-19-lactone, cymarin-19-carboxylic acid 5β-O-19-lactone, convallatoxin-19-carboxylic acid 5β-O-19-lactone, and strophalloside-19-carboxylic acid 5β-O-19-lactone were prepared.
研究了强心类
固醇的立体
化学结构转变,以在其中产生额外的内酯环。通过 3β-OH 基团和 19-羧基反应生成 δ-内酯,得到相应的 A/B-反式心脏类
固醇,通过 5β-OH 基团和 19-COOH 反应生成 β-内酯,得到研究了相应的A/B-顺式类
固醇。新的
生物活性化合物8(14)-脱氢牛黄素-19-
羧酸3β-O-19-内酯、旋花花素-19-
羧酸5β-O-19-内酯、cymarin-19-
羧酸5β-O-19-制备了旋花毒素-19-
羧酸5β-O-19-内酯和旋花球菌苷-19-
羧酸5β-O-19-内酯。