The remarkable transformation of fused-ring norbornene bridgemethylene alcohols into a product identified by X-ray diffraction as containing the novel tetracyclo[5.3.1.0.0]undecene system
作者:Kevin A. Mead、Kenneth Mackenzie、Peter Woodward
DOI:10.1039/p29820000571
日期:——
5,9]undec-3-ene (12), an apparently novel ring system derived by a new rearrangement sequence. The structure of tetrachlorotetracycloundecene (12) follows from the X-ray crystal structure of the methanesulphonate (14) of its simple 2-hydroxymethyl reduction product. 1H and 13C n.m.r. characteristics of (12), its various deuteriated analogues, and their synthesis are discussed.
的治疗抗-和顺式差向异构体(1)和(2)的外-内切-3,4,5,6- tetrachlorotetracyclo [6.2.1.1 3,6 0.0 2,7 ]十二碳-4,9- dien-含有H 2 SO 4 -CCl 4的11-醇除先前公认的四氯五环十二酮(3)外,还提供少量但大量的1,3,4,11-四氯-2-甲酰基四环[5.3.1.0 2,6 O. 5,9 ] undec-3-ene(12),一种由新的重排序列衍生而来的貌似新颖的环系统。四氯四环十一碳烯(12)的结构来自X甲磺酸盐(14)的简单2-羟甲基还原产物的X射线晶体结构。讨论了(12)的1 H和13 C nmr特性,其各种氘代类似物及其合成。
McCulloch,R.K. et al., Australian Journal of Chemistry, 1974, vol. 27, p. 1929 - 1941
作者:McCulloch,R.K. et al.
DOI:——
日期:——
Synthetic studies directed towards the potent cytotoxic natural product ottelione A: stereoselective construction of the complete framework
作者:Goverdhan Mehta、D. Srinivasa Reddy
DOI:10.1039/a907273j
日期:——
A stereoselective strategy for the rapid acquisition of the complete framework (dideoxyottelione A) of the promising cytotoxic agent ottelione A, with four contiguous stereogenic centres on a hydrindane skeleton and a sensitive 4-methylenecyclohex-2-enone functionality, from the readily available Diels–Alder adduct of 1,2,3,4-tetrachloro-5,5-dimethoxycyclopentadiene and norbornadiene, is delineated.