8-Aza-12-oxasteroids have been synthesized in a simple three-step process. As a consequence of two stareocontrolled reactions, the product is a stereospecifically homogeneous isomer with all- ring junctions; its structure has been determined by 1H and 13C NMR spectroscopy and X-ray diffraction.
8-Aza-12-oxasteroids已通过简单的三步过程合成。由于两个受星形控制的反应,该产物是具有全环连接的立体有规异构体。其结构已通过1 H和13 C NMR光谱法和X射线衍射确定。