11R)-7,8-diangeloyloxyiratzian-9-one (18), and (2S,3S,5R,10S,11R)-8-angeloyloxyiratzi-7-en-9-one (22), of which 8, 11, 14, and 18 possess new hydrocarbon skeletons. Their structures were determined by 1D and 2D NMR in combination with single-crystal X-ray diffraction analyses of derivatives 10, 15, 20, and 21, which allowed confirmation of their absolute configurations by means of the Flack and Hooft
通过1D和2D NMR结合衍
生物10、15、20和21的单晶X射线衍射分析确定其结构,从而可以通过Flack和Hooft参数确认其绝对构型。此外,从
氘标记实验中获得了一些反应机理信息。