Complex Polyheterocycles and the Stereochemical Reassignment of Pileamartine A via Aza-Heck Triggered Aryl C-H Functionalization Cascades.

Complex Polyheterocycles and the Stereochemical Reassignment of Pileamartine A via Aza-Heck Triggered Aryl C-H Functionalization Cascades.
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DOI:
10.1021/jacs.1c08615
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发表时间:
2021-09-29
影响因子:
15
通讯作者:
Bower JF
Bower JF
中科院分区:
化学1区
文献类型:
--
作者:
Jones BT;García-Cárceles J;Caiger L;Hazelden IR;Lewis RJ;Langer T;Bower JF

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结构复杂的苯并-和螺-稠合的N-多杂环可以通过分子内Pd(0)-催化的烯烃1,2-氨基芳基化反应获得。该方法使用N-(五氟苯甲酰氧基)氨基甲酸酯作为起始基序,并且这允许在芳香族组分的C-H钯化之前进行氮杂-赫克型烯烃氨基钯化。该化学在复杂生物碱(+)-pileamartine A的第一次全合成中展示,这导致了其绝对立体化学的重新分配。
Structurally complex benzo- and spiro-fused N-polyheterocycles can be accessed via intramolecular Pd(0)-catalyzed alkene 1,2-aminoarylation reactions. The method uses N-(pentafluorobenzoyloxy)carbamates as the initiating motif, and this allows aza-Heck-type alkene amino-palladation in advance of C–H palladation of the aromatic component. The chemistry is showcased in the first total synthesis of the complex alkaloid (+)-pileamartine A, which has resulted in the reassignment of its absolute stereochemistry.
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