Replacement of the C‐19 tertiary hydroxyl group of some thebaine and oripavine derivatives with bridged ring C (so‐called Bentley's compounds) for an azido group has been performed with hydrazoic acid. In case the hydroxyl group was connected to a centre of chirality, substitution resulted in the formation of diastereomeric mixture of azides and elimination took place as well, the extent of which was
一些
蒂巴因和东
罂粟碱衍
生物的 C-19 叔羟基被桥环 C(所谓的 Bentley 化合物)替换为
叠氮基已用
肼酸进行。在羟基与手性中心相连的情况下,取代导致形成
叠氮化物的非对映异构混合物并发生消除,其程度主要取决于空间因素。C-19 的构型已通过 1H-NMR 光谱和计算得到的胺 13a 和 13b 的质子-质子距离确定,该距离通过 10c 的还原和分离获得。