The structure III assigned to dehydrocostus lactone by Sorm et al. has been supported by converting it into (i) guaiane, C15H28 (I) and (ii) s-guaiazulene and chamazulene in fairly high yield from sone of its derivatives. The lactol XII, obtainable from III gives four different products (XIII, XIV, XVIII and XXIV) when subjected to Huang-Minlon reduction at 135° and 170° respectively. The dienic monol
Sorm等人将结构III分配给脱氢肋骨内酯。通过从其衍生物的原发中相当高的产率将其转化为(i)愈创木酚,C 15 H 28(I)和(ii)s-愈创木烯和chamazulene得到了支持。当分别在135°和170°下进行Huang-Minlon还原时,可从III获得的内酯XII产生四种不同的产物(XIII,XIV,XVIII和XXIV)。通过紫外和NMR光谱支持结构的二烯一元醇(XVIII),当进行金属胺还原反应时,表明其中存在烯丙基羟基,从而提供了碳氢化合物C 15 H 26 XXVIII,这证明了内酯的附着III在C 6 –C 7处。
Hikino,H. et al., Chemical and pharmaceutical bulletin, 1968, vol. 16, p. 1608 - 1610