Allylic C-H amination cross-coupling furnishes tertiary amines by electrophilic metal catalysis.
Allylic C-H amination cross-coupling furnishes tertiary amines by electrophilic metal catalysis.
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DOI:
10.1126/science.abn8382
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发表时间:
2022-04-15
期刊:
影响因子:
56.9
通讯作者:
White, M. Christina
中科院分区:
文献类型:
--
作者:
Ali, Siraj Z.;Budaitis, Brenna G.;Fontaine, Devon F. A.;Pace, Andria L.;Garwin, Jacob A.;White, M. Christina
Intermolecular cross-coupling of terminal olefins with secondary amines to form complex tertiary amines—a common motif in pharmaceuticals—remains a major challenge in chemical synthesis. Basic amine nucleophiles in non-directed, electrophilic metal-catalyzed aminations tend to bind to and thereby inhibit metal catalysts. We reasoned that an autoregulatory mechanism coupling the release of amine nucleophile with catalyst turnover could enable functionalization without inhibiting metal-mediated heterolytic carbon-hydrogen cleavage. Here, we report a palladium(II)-catalyzed allylic carbon-hydrogen amination cross-coupling using this strategy, featuring 48 cyclic and acyclic secondary amines (10 pharmaceutically relevant cores) and 34 terminal olefins (bearing electrophilic functionality) to furnish 81 tertiary allylic amines, including 12 drug compounds and 10 complex drug derivatives, with excellent regio- and stereo-selectivity (>20:1 linear:branched, >20:1 E:Z).
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