preparation of N-CF3 compounds through fluorination and trifluoromethylation of N-containing compounds. The development of new synthetic methods from abundant and easily available substrates is highly desirable but still challenging. Herein, we report the design and synthesis of novel N-Cbz- and N-Boc-N-trifluoromethyl hydroxylamine reagents by silver-mediated oxidative trifluoromethylation. These reagents
A radical relay strategy is described to synthesize functionalized β-amino alcohols. This strategy is enabled by photoredox-catalyzed and nitrogen-centered radical-triggered cascade reactions of styrenes (or phenylacetylenes), enol derivatives, and O-acyl hydroxylamines in DMSO. The broad synthetic application of this method is demonstrated by the reaction of structurally diverse reaction components
A photocatalytic multi‐component radical relay reaction has been developed for the stereodivergent synthesis of both stereoisomers of α‐aminomethyl cinnamyl ethers. The radical relay reaction of hydroxylamine derivatives, enol ethers and alkenyl boronic acids in DMSO under white LEDs could lead to E‐isomers of α‐aminomethyl cinnamyl ethers. The E‐isomers could subsequently isomerize to less thermodynamically
radical-triggered cascade reactions of styrenes, enamides, and O-acylhydroxylamines in DMSO. Four bonds (one C–C, one C–N, and two C–O) are constructed in a single operation. Various functionalized vicinal diamines have been furnished by the radical relay reaction. A strategy has been described to synthesize β,γ-diaminoketones. This strategy is enabled by photoredox-catalyzed and nitrogen-centered radical-triggered
Rhodium-Catalyzed Selective C(<i>sp</i><sup>2</sup>)–H Activation/Annulation of <i>tert</i>-Butyl Benzoyloxycarbamates with 1,3-Diynes: A One Step Access to Alkynylated Isocoumarins and Bis-Isocoumarins
作者:Bedadyuti Vedvyas Pati、Shyam Kumar Banjare、Gopal Krushna Das Adhikari、Tanmayee Nanda、Ponneri C. Ravikumar
DOI:10.1021/acs.orglett.2c01901
日期:2022.8.12
and stereoselective synthesis of alkynylated and bis-isocoumarin from 1,3-dialkyne. Exclusive one-pot formation of 3,3-bis-isocoumarin isomers has been achieved by eliminating several other possibilities. This is the first example of transition metal catalyzed synthesis of alkynylated and bis-isocoumarin scaffolds. The protocol is compatible with a wide range of functional groups affording good to excellent