Radical C−N Borylation of Aromatic Amines Enabled by a Pyrylium Reagent
作者:Yuanhong Ma、Yue Pang、Sonia Chabbra、Edward J. Reijerse、Alexander Schnegg、Jan Niski、Markus Leutzsch、Josep Cornella
DOI:10.1002/chem.202000412
日期:2020.3.23
Herein, we report a radical borylation of aromatic amines through a homolytic C(sp 2 )-N bond cleavage. This method capitalizes on a simple and mild activation via a pyrylium reagent ( Sc Pyry-OTf) thus priming the amino group for reactivity. The combination of terpyridine and a diboron reagent triggers a radical reaction which cleaves the C(sp 2 )-N bond and forges a new C(sp 2 )-B bond. The unique
The Multiple Facets of Iodine(III) Compounds in an Unprecedented Catalytic Auto-amination for Chiral Amine Synthesis
作者:Julien Buendia、Gwendal Grelier、Benjamin Darses、Amanda G. Jarvis、Frédéric Taran、Philippe Dauban
DOI:10.1002/anie.201602022
日期:2016.6.20
Iodine(III) reagents are used in catalytic one‐pot reactions, first as both oxidants and substrates, then as cross‐coupling partners, to afford chiral polyfunctionalized amines. The strategy relies on an initial catalytic auto C(sp3)−H amination of the iodine(III) oxidant, which delivers an amine‐derived iodine(I) product that is subsequently used in palladium‐catalyzed cross‐couplings to afford a
作者:David Phillips、Glen Brodie、Sarah Memarzadeh、Gi Lum Tang、David J. France
DOI:10.1039/d0ra03338c
日期:——
MIDAboronates are among the most useful reagents for the Suzuki–Miyaura reaction. This chemistry typically generates new bonds between two aromatic rings, thereby restricting access to important areas of chemical space. Here we demonstrate the coupling of MIDAboronates to allylic electrophiles, including a new synthesis of the well-known COX inhibitor ibuprofen.
Direct Chan–Lam Amination and Etherification of Aryl BMIDA Reagents
作者:John M. Halford‐McGuff、Eva M. Israel、Matthew J. West、Julien C. Vantourout、Allan J. B. Watson
DOI:10.1002/ejoc.202200993
日期:2022.12.6
The direct Chan–Lamcoupling of arylboronicacid methyliminodiacetic acid esters (ArBMIDA) with amine and alcohol nucleophiles is reported. Limitations of the process are also discussed. We also demonstrate how this method can be used in the chemoselective synthesis of heterocyclic scaffolds by using the unique attributes of the BMIDA protecting group.