Reductive electrophilic C–H alkylation of quinolines by a reusable iridium nanocatalyst

Abstract

The incorporation of a coupling step into the reduction of unsaturated systems offers a desirable way for diverse synthesis of functional molecules, but it remains to date a challenge due...

Direct access to functional phenazines via oxidative annulation of anilines and o-phenylenediamines with a reusable cobalt catalyst

“…Moreover, the dibromo phenazine C40 underwent a smooth Suzuki cross-coupling reaction with pyridin-3-ylboronic acid, delivering product C53 in 82% yield (Scheme 6c); this example exhibits a promising way to rapidly access optoelectronic materials and nitrogen-containing ligands. 23…”

Utilizing Nitroarenes and HCHO to Directly Construct Functional N‐Heterocycles by Supported Cobalt/Amino Acid Relay Catalysis

“…Based on the above findings, a plausible reaction pathway for the formation of product B1 is depicted in Figure 7. Initially, the Co-N x sites on the catalyst surface bind active H-atoms from the decomposition of HCOOH, [7,28,33,34]…”

“…Based on this idea, we wish herein to report a Ndoped carbon-supported bifunctional cobalt catalyst (CoÀ N x /NC-900), featuring atomically dispersed Co-species and abundant electron-rich nitrogen sites, and describe, for the first time, the relay catalysis of such a reusable catalyst with L-proline is successfully applied to directly and diversely construct 1,3-diaryl imidazolines from nitroarenes and formaldehyde with renewable formic acid as the reductant. [33,34] This reaction proceeds with operational simplicity, good substrate and functionality compatibility, high step and atom efficiency, which offers a practical platform to access NHC precursors (Figure 1c).…”

Recyclable Metallic Imidazolium-Based Ionic Liquid-Catalyzed Selective Mono- and Double-Hydroboration in Water

“…According to green chemistry, the recyclability of the catalyst is also an important issue for the reaction. − Because of the unique features on low vapor pressure, structural designability, and good solubility, ionic liquids (ILs) have been considered to be an alternative environmentally friendly solvent. − The designable cations and anions from ILs could provide specific functions with cooperative or synergistic effects in organic synthesis or catalysis area, such as CO 2 capture and transformations, − dehydrative coupling reaction, ring-closing C–O/C–O metathesis, N -heteroarene reduction, hydrothiocyanation reaction, asymmetric Michael addition and Aldol condensation, and so on. However, only scarce reports have been described and focused on IL-catalyzed hydroboration.…”