The 13C and 1H n.m.r. spectra of homocubane, norsnoutane and their 9-keto- and 9,9-ethylenedioxy-derivatives, and a novel route to functionalised brendanes
作者:John E. Hamlin、Kenneth J. Toyne
DOI:10.1039/p19810002731
日期:——
The 13C and 1H n.m.r. spectra of homocubane (pentacyclo[4.3.0.02,5.03,8.04,7]nonane)(5), norsnoutane (pentacyclo[4.3.0.02,4.03,8.05,7]nonane)(12) and their 9-keto- and 9,9-ethylenedioxy-derivatives have been analysed using deuterium labelling. The protons α to the carbonyl or acetal group and the carbon atoms bearing these protons show unusual absorptions. The substituent effects in homocubanes and
的13 C和1 H核磁共振光谱的homocubane(五环[4.3.0.0 2,5 0.0 3,8 0.0 4,7 ]壬烷)(5),norsnoutane(五环[4.3.0.0 2,4 0.0 3,已经使用氘标记法分析了8 .0 5,7 ]壬烷)(12)及其9-酮和9,9-乙撑二氧基衍生物。羰基或缩醛基上的质子α和带有这些质子的碳原子显示出不同寻常的吸收。高纯和降冰片烷中的取代基作用相似,在笼状结构中没有明显的附加作用。内膜的作用讨论了正壬烷中的α-环化环丙烷环。盐酸催化的9,9-乙撑二氧五环-[4.3.0.0 2,4 .0 3,8 .0 5,7 ]壬烷(10)的重排生成布伦丹衍生物exo -2-chlorotricyclo [4.2.1.0 3 ,7 ] non-4-en-8-one(16)。