Total Synthesis, Assignment of Absolute Stereochemistry, and Structural Revision of Chlorofusin
作者:Wen-Jian Qian、Wan-Guo Wei、Yong-Xia Zhang、Zhu-Jun Yao
DOI:10.1021/ja072225g
日期:2007.5.1
The first totalsynthesis of chlorofusin was accomplished in a convergent fashion. With all four unambiguous diastereomeric model chromophores as references, the absolutestereochemistry of the chlorofusin chromophore was determined and revised to be (4S,8R,9S) by 1H NMR studies and asymmetric synthesis. This allows the complete structure of natural chlorofusin to be assigned for the first time. Enantioselective
Unified flexible total synthesis of chlorofusin and artificial Click mimics as antagonists against p53–HDM2 interactions
作者:Hai-Bo Qiu、Xin-Ya Chen、Qing Li、Wen-Jian Qian、Shun-Ming Yu、Gong-Li Tang、Zhu-Jun Yao
DOI:10.1016/j.tetlet.2014.09.028
日期:2014.10
A practical HPLC-free total synthesis of chlorofusin has been successfully accomplished in this work. The new synthesis showed great flexibility and convenience in generating artificial natural product-like mimics through Click chemistry, and enabled us to further investigate the biological importance of the chromophore and the spiro-aminal functionality of the natural product. The entire skeleton is believed to be essential for satisfactory biological activities of both natural chlorofusin and unnatural mimics. Two artificial Click hybrids were found to exhibit improved inhibitory activity against p53-HDM2 bindings over the natural product. (C) 2014 Elsevier Ltd. All rights reserved.
Bromoetherification-based strategy towards the spirocyclic chromophore of chlorofusin
作者:Wan-Guo Wei、Wen-Jian Qian、Yong-Xia Zhang、Zhu-Jun Yao
DOI:10.1016/j.tetlet.2006.04.062
日期:2006.6
A short and direct route to the racemic model chromophore of the potent p53-MDM2 antagonist, chlorofusin, is presented. The spirocyclic chromophores were successfully constructed in high yields by an NBS-mediated intramolecular haloetherification. Ring expansion was observed in the subsequent reaction of the bromides with silver nitrate in refluxing acetone and water. Conversion of the bromides to the desired ketones was finally achieved by NMO oxidation. All four possible isomeric chromophores were finally synthesized and unambiguously characterized by X-ray crystallography studies. (c) 2006 Elsevier Ltd. All rights reserved.
Total Synthesis of Chlorofusin, Its Seven Chromophore Diastereomers, and Key Partial Structures
作者:Ryan C. Clark、Sang Yeul Lee、Dale L. Boger
DOI:10.1021/ja8012819
日期:2008.9.17
spectroscopic properties for these eight compounds and those of simpler models with that reported for the natural product allowed the full assignment of the (4R,8S,9R)-stereochemistry of the chlorofusin chromophore. The natural, but stereochemically reassigned, diastereomer of the dipeptide conjugate was incorporated in a convergent total synthesis of chlorofusin confirming the stereochemical reassignment
Stereodivergent total synthesis of chlorofusin and its all seven chromophore diastereomers
作者:Hai-Bo Qiu、Wen-Jian Qian、Shun-Ming Yu、Zhu-Jun Yao
DOI:10.1016/j.tet.2014.10.062
日期:2015.1
our recent achievement, in details, of developing a convenient stereodivergent route for parallel total synthesis of chlorofusin (1) and its all seven chromophore diastereomers (1a–1g) in enantiopure forms, starting from a common racemic azaphilone precursor 10. The newly developed total synthesis shows the great advantages of economy, scalability, stable intermediates, high yields, ease of HPLC-free