Elucidating Dramatic Ligand Effects on SET Processes: Iron Hydride versus Iron Borohydride Catalyzed Reductive Radical Cyclization of Unsaturated Organic Halides
作者:Sara H. Kyne、Martin Clémancey、Geneviève Blondin、Etienne Derat、Louis Fensterbank、Anny Jutand、Guillaume Lefèvre、Cyril Ollivier
DOI:10.1021/acs.organomet.7b00603
日期:2018.3.12
organic halides in the presence of NaBH4. Mechanistic investigations have established that the ligand bound to the metal center (acetonitrile versus ethylenebis(diphenylphosphine) (dppe)) plays a crucial role in the structure and reactivity of the active anionic iron(I) hydride ([HFeCl(dppe)2]−) and borohydride ([(η1-H3BH)FeCl(NCCH3)4]−) with unsaturated haloacetals. This work provides new insights
1,3,2‐Diazaphospholene‐Catalyzed Reductive Cyclizations of Organohalides**
作者:Johannes Klett、Łukasz Woźniak、Nicolai Cramer
DOI:10.1002/anie.202202306
日期:2022.7.25
1,3,2-diazaphospholenes hydrides (DAP-H) are shown as efficient catalysts for reductive radical cyclization of aryl and alkyl halides under irradiation with visible light. The pivotal DAP catalyst turnover was achieved by a DBU-assisted σ-bondmetathesis between the formed DAP halide and HBpin.