Configurational analysis of tetracyclic dimeric pyrrole-imidazole alkaloids using a floating chirality approach.
Configurational analysis of tetracyclic dimeric pyrrole-imidazole alkaloids using a floating chirality approach.
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DOI:
10.1021/np200514g
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发表时间:
2012-02-24
影响因子:
5.1
通讯作者:
Baran PS
中科院分区:
文献类型:
--
作者:
Köck M;Schmidt G;Seiple IB;Baran PS
The structure elucidation of the palau'amine congener tetrabromostyloguanidine (1), which used interproton distances from ROESY spectra as restraints in a computational approach, the so-called fc-rDG/DDD method, led to a revision of the relative configuration of palau'amine (2) and its congeners in 2007. The recent total synthesis of (±)-palau'amine (2) subsequently confirmed the computed structural revision of the relative configuration. In order to test a broader application range of the fc-rDG/DDD method, the present study investigated two additional dimeric pyrrole-imidazole alkaloids, axinellamine A (3) and 3,7-epi-massadine chloride (4). These calculations allowed the simultaneous assignment of the relative configuration for all eight stereogenic centers of compounds 3 and 4 without using any information from the reported configurations. In contrast to the palau'amine congeners, the fc-rDG/DDD method confirmed the relative configuration originally described for axinellamine A (3) and 3,7-epi-massadine chloride (4).
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影响因子:
16.6
作者:
Seiple, Ian B.;Su, Shun;Young, Ian S.;Lewis, Chad A.;Yamaguchi, Junichiro;Baran, Phil S.
通讯作者:
Baran, Phil S.
影响因子:
16.6
作者:
Grube, Achim;Koeck, Matthias
通讯作者:
Koeck, Matthias
影响因子:
2.2
作者:
Kock, M;Junker, J
通讯作者:
Junker, J
影响因子:
3.6
作者:
MIERKE, DF;REGGELIN, M
通讯作者:
REGGELIN, M
影响因子:
16.6
作者:
O'Malley, Daniel P.;Yamaguchi, Junichiro;Baran, Phil S.
通讯作者:
Baran, Phil S.