The Willgerodt-Kindler reaction of 21-chloro-20-ketosteroids (5) or sodium 21-thiosulfate derivatives of 20-ketosteroids (6) with sulfur in secondary amines gave the corresponding steroidal α-oxothiocarboxamides (3) in good yields. Among these compounds (3), 11β, 17α-dihydroxy-21-morpholinopregna-1, 4-diene-3, 20-dione-21-thione (3a) and 11β, 17α-dihydroxy-21-morpholinopregn-4-ene-3, 20-dione-21-thione (3b) showed potent anti-inflammatory activities comparable to or a little less than those of the parent compounds, prednisolone and hydrocortisone, respectively, in the carrageenin edema test in rats. 3a also showed potent activity in the granuloma pouch test in rats but much less activity in the cotton pellet test in rats. These results suggest that 3a might be more active against acute or subacute inflammation than against chronic inflammation.
21-Cloro-20-ketosteroids (5) 或 20-ketosteroids (6) 的 21-thiosulfate
钠衍
生物与仲胺中的
硫发生 Willgerodt-Kindler 反应,得到了相应的甾体 α-
氧硫代羧
酰胺 (3),收率很高。在这些化合物(3)中,11β,17α-二羟基-21-
吗啉基孕甾-1,4-二
烯-3,20-二
酮-21-
硫酮(3a)和 11β,17α-二羟基-21-
吗啉基孕甾-4-二
烯-3,20-二
酮-21-
硫酮(3b)在大鼠角叉菜胶
水肿试验中显示出与母体化合物
泼尼松龙和
氢化可的松相当或略低的强效抗炎活性。3a 在大鼠肉芽肿袋试验中也显示出强大的活性,但在大鼠棉球试验中的活性要低得多。这些结果表明,3a 对急性或亚急性炎症的活性可能大于对慢性炎症的活性。