[4+2] Cycloaddition Reactions Between 1,8-Disubstituted Cyclooctatetraenes and Diazo Dienophiles: Stereoelectronic Effects, Anticancer Properties and Application to the Synthesis of 7,8-Substituted Bicyclo[4.2.0] octa-2,4-dienes

被引:8
作者
Grange, Rebecca L. [1 ]
Gallen, Michael J. [1 ]
Schill, Heiko [1 ]
Johns, Jenny P. [2 ]
Dong, Lin [1 ]
Parsons, Peter G. [2 ]
Reddell, Paul W. [3 ]
Gordon, Victoria A. [3 ]
Bernhardt, Paul V. [1 ]
Williams, Craig M. [1 ]
机构
[1] Univ Queensland, Sch Chem & Mol Biosci, Brisbane, Qld 4072, Australia
[2] PO Royal Brisbane Hosp, Queensland Inst Med Res, Brisbane, Qld 4029, Australia
[3] EcoBiotics Ltd, Yungaburra, Qld 4884, Australia
关键词
antitumor agents; bicyclo compounds; cycloaddition; cyclooctatetraene; diazo compounds; Diels-Alder reaction; ENDIANDRA-INTRORSA LAURACEAE; A-ACID-G; BIOMIMETIC SYNTHESIS; ORGANIC-SYNTHESIS; STEREOSELECTIVE-SYNTHESIS; ORTHO-PHOTOCYCLOADDITION; VALENCE ISOMERIZATION; STEROIDAL 5,7-DIENES; RETRO-CYCLOADDITION; CYCLO-OCTATETRAENES;
D O I
10.1002/chem.200903454
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A detailed examination of [4+2] cycloaddition reactions between 1,8-disubstituted cyclooctatetraenes and diazo compounds revealed that 4-phenyl-1,2,4-triazole-3,5-dione (PTAD) reacts to form either 2,3- or 3.4-disubstituted adducts. The product distribution can be controlled by modulating the electron density of the cyclooctatetraene. Unprecedented [4+2] cycloadditions between diisopropyl azodicarboxylate (DIAD) and 1,8-disubstituted cyclooctatetraenes are also described and further manipulation of a resulting cycloadduct uncovered a new pathway to the synthetically challenging bicyclo[4.2.0]octa-2,4-diene family. Variation of the substituents resulted in a range of compounds displaying selective action against different human tumour cell types.
引用
收藏
页码:8894 / 8903
页数:10
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