Cyclic ureas (DMI, DMPU) as efficient, sustainable ligands in iron-catalyzed C(sp<sup>2</sup>)–C(sp<sup>3</sup>) coupling of aryl chlorides and tosylates
作者:Elwira Bisz、Michal Szostak
DOI:10.1039/c7gc02690k
日期:——
Iron-catalyzed cross-coupling has emerged as a powerful tool for sustainable catalysis. However, by far the most common ligand in iron-catalyzed cross-couplings for preparative and industrial applications is reprotoxic NMP. Herein, we report that cyclic ureas (DMI, DMPU) are efficient and sustainable alternatives to NMP in iron-catalyzedalkylations of aryl chlorides and tosylates with alkyl Grignard
The iron-catalyzed C(sp2)–C(sp3) cross-coupling provides a highly economical route to exceedingly valuable alkylated arenes that are widespread in medicinal chemistry and materials science. Herein, we report an operationally-simple protocol for the selective C(sp2)–C(sp3) iron-catalyzed cross-coupling of aryl chlorides with Grignard reagents at low catalyst loading. A broad range of electronically-varied
2-Methyltetrahydrofuran: A Green Solvent for Iron-Catalyzed Cross-Coupling Reactions
作者:Elwira Bisz、Michal Szostak
DOI:10.1002/cssc.201800142
日期:2018.4.25
conditions. Furthermore, large‐scale cross‐coupling, cross‐coupling of heteroaromatic substrates, and cross‐coupling of challenging aryl tosylates and carbamates mediated by Fe–N‐heterocyclic carbene catalytic systems in eco‐friendly 2‐MeTHF were also carried out. The developed method was applied to the key cross‐coupling in the synthesis of a fibrinolysis inhibitor, further highlighting the potential of 2‐MeTHF
Ligand Effect on Iron‐Catalyzed Cross‐Coupling Reactions: Evaluation of Amides as O‐Coordinating Ligands
作者:Elwira Bisz、Marlena Kardela、Michal Szostak
DOI:10.1002/cctc.201901150
日期:2019.12.5
aptitude as well as sterics around the amide bond pinpointed the features that are important for catalysis. The study led to the discovery of several highly efficient ligands for cross‐coupling, including TMU (TMU=tetramethylurea), N‐cyclic and coordinating benzamides. Crucially, the study demonstrates several avenues for replacing reprotoxic NMP, which is currently still the most common additive in
<i>N</i>-Butylpyrrolidone (NBP) as a non-toxic substitute for NMP in iron-catalyzed C(sp<sup>2</sup>)–C(sp<sup>3</sup>) cross-coupling of aryl chlorides
作者:Elwira Bisz、Martina Koston、Michal Szostak
DOI:10.1039/d1gc02377b
日期:——
serves as a highly effective substitute for NMP in iron-catalyzed C(sp2)–C(sp3) cross-coupling of aryl chlorides with alkyl Grignardreagents. This challenging alkylation proceeds with organometallics bearing β-hydrogens with efficiency superseding or matching that of NMP with ample scope and broad functional group tolerance. Appealing applications are demonstrated in the cross-coupling in the presence