Dissolution of 17α-hydroxyprogesterone (1) in 80% sulfuric acid gave two D-homosteroids through C (13)-C (17) bond migration, 17aβ-hydroxy-17aα-methyl-D-homoandrost-4-ene-3, 17-dione (2) and 17a-methylene-D-homoandrost-4-ene-3, 17-dione (3), in 53 and 9% yields, respectively. The latter product was also obtained in 73% yield from the reaction of 1 with 90% sulfuric acid. Proton nuclear magnetic resonance (1H-NMR) studies of the acid solutions revealed that the D-homoannulation of 1 to 2 occurs rapidly even in 80 or 90% sulfuric acid, and that 2 is dehydrated rapidly to 3 in 90% sulfuric acid. The D-homoannulation was demonstrated to be an initial step in the color and fluorescence reaction of 1 with sulfuric acid.
将
17α-羟基孕酮 (1) 溶解在 80%
硫酸中,通过 C (13)-C (17) 键迁移得到两种 D-同质类
固醇,17aβ-羟基-17aα-
甲基-D-homoandrost-4-ene-3, 17 -二
酮(2)和17a-亚
甲基-D-同雄-4-
烯-3、17-二
酮(3),产率分别为53%和9%。后一产物也由1与90%
硫酸反
应得到,收率73%。
对酸溶液的质子核磁共振 (1H-NMR) 研究表明,即使在 80% 或 90%
硫酸中,1 至 2 的 D-同环化也会快速发生,并且 2 在 90%
硫酸中快速
脱水为 3。 D-同环化被证明是 1 与
硫酸的颜色和荧光反应的第一步。