Synthesis of the ABCDEFG ring system of maitotoxin.
Synthesis of the ABCDEFG ring system of maitotoxin.
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DOI:
10.1021/ja102260q
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发表时间:
2010-05-19
影响因子:
15
通讯作者:
Rivas F
中科院分区:
文献类型:
--
作者:
Nicolaou KC;Aversa RJ;Jin J;Rivas F
Maitotoxin (1) continues to fascinate scientists not only because of its size and neurotoxicity but also due to its molecular architecture. In order to provide further support for its structure and facilitate fragment-based biological studies, we developed an efficient chemical synthesis of the ABCDEFG segment 3 of maitotoxin. 13C NMR chemical shift comparisons of synthetic 3 with the corresponding values for the same carbons of maitotoxin revealed a close match, providing compelling evidence for the correctness of the originally assigned structure to this polycyclic system of the natural product. The synthetic strategy for the synthesis of 3 relied heavily on our previously developed furan-based technology involving sequential Noyori asymmetric reduction and Achmatowicz rearrangement for the construction of the required tetrahydropyran building blocks, and employed a B-alkyl Suzuki and a Horner–Wadsworth– Emmons olefination to accomplish their assembly and elaboration to the final target molecule.
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