Total synthesis and biological evaluation of (+)- and (-)-bisanthraquinone antibiotic BE-43472B and related compounds.
Total synthesis and biological evaluation of (+)- and (-)-bisanthraquinone antibiotic BE-43472B and related compounds.
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DOI:
10.1021/ja9073694
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发表时间:
2009-10-21
影响因子:
15
通讯作者:
Montero, Ana
中科院分区:
文献类型:
--
作者:
Nicolaou, K. C.;Becker, Jochen;Lim, Yee Hwee;Lemire, Alexandre;Neubauer, Thomas;Montero, Ana
The bisanthraquinone antibiotic BE-43472B [(+)-1] was isolated by Rowley and coworkers from a streptomycete strain found in a green algae associated with the ascidian Ecteinascidia turbinata and has shown promising antibacterial activity against clinically derived isolates of methicillin-susceptible, methicillin-resistant, and tetracyclin-resistant Staphylococcus aureus (MSSA, MRSA, and TRSA, respectively), and vancomycin-resistant Enterococcus faecalis (VRE). Described herein is the first total synthesis of both enantiomers of this bisanthraquinone antibiotic, the determination of its absolute configuration, as well as the biological evaluation of these and related compounds. The developed synthesis relies on a highly efficient cascade sequence involving an intermolecular Diels–Alder reaction between diene (R)-61 and dienophile 55 followed by an intramolecular nucleophilic aromatic ipso substitution. Late stage transformations included a remarkable photochemical α,β-epoxyketone rearrangement [80 → (+)-1]. Interestingly, the unnatural enantiomer [(–)-1] of antibiotic BE-43472B exhibited comparable antibacterial properties to those of the natural enantiomer [(+)-1].
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影响因子:
1.8
作者:
MCDOUGAL, PG;JUMP, JM;RICO, JG
通讯作者:
RICO, JG
影响因子:
1.8
作者:
NAHM, S;WEINREB, SM
通讯作者:
WEINREB, SM
DOI:
10.1002/prac.19973390194
发表时间:
1997-01-01
期刊:
JOURNAL FUR PRAKTISCHE CHEMIE-CHEMIKER-ZEITUNG
影响因子:
--
作者:
Mentzel, M;Hoffmann, HMR
通讯作者:
Hoffmann, HMR
影响因子:
3.6
作者:
Barriault, L;Thomas, JDO;Clément, R
通讯作者:
Clément, R
影响因子:
3.6
作者:
Carreño, MC;García-Cerrada, S;Di Vitta, C
通讯作者:
Di Vitta, C