The heterocyclic moiety of 17 beta-(2-aminooxazol-4-yl) steroids is sensitive to the oxidizing action of hydrogen peroxide and yields products mainly from the opening of the amino-oxazole ring. Unlike simple 2-aminooxazoles, it does not rearrange to 2-imidazolone and the expected steroidal hydroperoxyimidazolidinones were not detected. Among the substances we isolated, N-(aminocarbonyl)-17 alpha-h
17个β-(
2-氨基恶唑-4-基)类
固醇的杂环部分对
过氧化氢的氧化作用敏感,并且主要从
氨基-
恶唑环的打开产生产物。与简单的
2-氨基恶唑不同,它不会重排为
2-咪唑啉酮,也未检测到预期的甾体氢过氧
咪唑烷酮。在我们分离出的物质中,N-(
氨基羰基)-17α-羟基-17-羧酰胺(2a)和(3a)在反应条件下进行自环化,得到
甾体17-螺氧杂唑烷二酮(2d)和(3d)。在强碱性介质中,高产率地由(2a)合成了Spirane(2d)。