Ruthenium‐Catalyzed Dehydrogenation Through an Intermolecular Hydrogen Atom Transfer Mechanism
作者:Lin Huang、Alessandro Bismuto、Simon A. Rath、Nils Trapp、Bill Morandi
DOI:10.1002/anie.202015837
日期:2021.3.22
The direct dehydrogenation of alkanes is among the most efficient ways to access valuable alkene products. Although several catalysts have been designed to promote this transformation, they have unfortunately found limited applications in fine chemical synthesis. Here, we report a conceptually novel strategy for the catalytic, intermolecular dehydrogenation of alkanes using a ruthenium catalyst. The combination
desaturation of amines. These hybrid Pd-radical intermediates are efficiently generated under mild photoinduced conditions and are capable of a 1,n-HAT (n = 5-7) event at C(sp3)-H sites. The selectivity of HAT is tunable by varying different auxiliaries, which highlight the generality of this method. Remarkably, this desaturation method, which operates under mild conditions and does not require employment
Ortho-substituted iodobenzenes as novel organocatalysts for bromination of alkenes
作者:D. Christopher Braddock、Gemma Cansell、Stephen A. Hermitage
DOI:10.1039/b604130b
日期:——
Suitably ortho-substituted iodobenzenes act as organocatalysts for the transfer of electrophilic bromine from N-bromosuccinimide to alkenes via the intermediacy of bromoiodinanes.
of feedstock amines remains a formidable challenge. Herein, we have developed a general, mild, and photoinduced transition-metal- and strong-base-free method for α-C(sp3)–H borylation of amines. This protocol features a regioselective 1,5-hydrogen atom transfer process to access key α-aminoalkyl radical intermediate using commercially available easy-to-install/remove iodobenzoyl radical translocating
Photocatalytic Hydrogen Atom Transfer-Induced Arbuzov-Type α-C(sp<sup>3</sup>)–H Phosphonylation of Aliphatic Amines
作者:Zhexuan Lei、Weigang Zhang、Jie Wu
DOI:10.1021/acscatal.3c04621
日期:2023.12.15
applications. Herein, we report photocatalytic HAT-induced α-C(sp3)–H phosphonylation of aliphatic amines, providing rapid access to structurally diverse α-aminophosphonates from abundant amines. Leveraging intramolecular HAT, radicalpolarcrossover, and an Arbuzov-type phosphonylation cascade, the challenges associated with HAT-induced C(sp3)–H to C(sp3)–P transformation were overcome. This protocol features