Synthesis and antitumoral activities of marine ent-chromazonarol and related compounds
摘要:
Efficient syntheses of ent-isozonarol (6a), ent-isozonarone (7a) and ent-chromazonarol (8) from (-)-sclareol (12) are described. 6a and 7a show a significative antitumoral activity. (C) 1999 Elsevier Science Ltd. All rights reserved.
A nature-inspired concise synthesis of (+)-ent-chromazonarol
作者:JieHui Huang、XiaoGuang Lei
DOI:10.1007/s11426-012-4826-0
日期:2013.3
A large number of sesquiterpene quinone/hydroquinone natural products including (+)-ent-chromazonarol have been isolated and received great attention from the synthetic community. Herein, we report a nature-inspired concise synthesis of (+)-ent-chromazonarol in 4 steps from a readily available starting material. The synthesis relied on a Lewis acid mediated cyclization which correctly installed two vicinal stereocenters in one step. This highly efficient synthetic route allows us to further prepare natural product congeners for further biological studies.
作者:Kevin K. W. Kuan、Henry P. Pepper、Witold M. Bloch、Jonathan H. George
DOI:10.1021/ol301715u
日期:2012.9.21
A total synthesis of the marine spongemeroterpenoid (+)-aureol has been achieved in 12 steps (6% overall yield) from (+)-sclareolide. Key steps of the synthesis include a biosynthetically inspired sequence of 1,2-hydride and methyl shifts, and a biomimetic cycloetherification reaction.
作者:Kevin K. W. Kuan、Aylin M. C. Hirschvogel、Jonathan H. George
DOI:10.1071/ch16218
日期:——
propose that the 6–7 ring system common to each of the frondosins is biosynthesized via ring expansion of a 6–6 ring system. Compelling evidence in favour of this proposal was obtained in the form of a biomimetic synthesis of the frondosin 6–7 ring system, which features a highly stereo- and regio-selective ring expansion cascade reaction as the key step.