Synthesis of a 17a-oxa-17a-homobrassinosteroids, i.e. brassinosteroids having two lactone rings, is described. In the bean second internode bioassay, dilactone 16 was the most effective of the compounds synthesized. In the same test, the castasterone analogue 12 exhibited a growth-retarding effect.
描述了合成17a-氧杂-17a-同型油菜素类物质,即含有两个内酯环的油菜素类物质。在豆科植物的第二节间生物测定中,双内酯16是合成化合物中最有效的。在同样的测试中,类固醇激素类似物12表现出抑制生长的效果。