An N-heterocyclic carbene based MOF catalyst for Sonogashira cross-coupling reaction

Abstract

The post-synthetic modification of azolium containing MOFs generated a new heterogeneous N-heterocyclic carbene catalyst (1-Pd), which is very active for Sonogashira cross coupling reaction.

Self‐Generation of Surface Roughness by Low‐Surface‐Energy Alkyl Chains for Highly Stable Superhydrophobic/Superoleophilic MOFs with Multiple Functionalities

“…More evidence is provided by control experiments utilizing various organic solvents, in which only low conversion was observed (see Table S9). In contrast to previously reported heterogeneous catalysts for the Sonogashira reaction (see Table S10), superhydrophobic UiO‐67‐Oct‐L 2 ‐35.7 %‐Pd II is also able to effectively catalyze the reaction at ambient temperature without heating, thus acting as an environmentally friendly and cost‐saving heterogeneous catalyst.…”

Engineering Metal–Organic Framework Catalysts for C−C and C−X Coupling Reactions: Advances in Reticular Approaches from 2014–2018

“…[145] Thep arent MOF was synthesized by the treatment of zinc nitrate hexahydrate with 1,3-bis( 4-carboxyphenyl)imidazolium chloride. [145] Thep arent MOF was synthesized by the treatment of zinc nitrate hexahydrate with 1,3-bis( 4-carboxyphenyl)imidazolium chloride.…”

Confinement of Metal–N‐Heterocyclic Carbene Complexes to Control Reactivity in Catalytic Reactions

“…The one‐pot preparation of metal–NHC‐containing MOFs from azolium carboxylate or preformed metal–NHC‐carboxylate precursors leads to MOF structures with an homogeneous and organized repartition of metal–NHC units in the 3D network (Figure a–c) . In contrast, post‐modification of already constructed azolium‐based MOFs, in particular by Pd(OAc) 2 treatment, was shown to give metal–NHC‐containing MOFs with only 42–76 % of the sites occupied by the metal due to partial deprotonation of the azolium moieties (Figure d) –. Post‐modification by linker exchange was also used to generate Ir–NHC‐containing MOFs with NHC–Ir units as parts of a tetrahedral supramolecular structure (Figure e) …”

“…Various 3D MOF structuresw ith NHC-metal (metal = Cu, Pd, Ir) units as structural elements have been assembled by using ditopic NHC-bis-carboxylate ligandso rb is(NHC-carboxylate) units ( Figure 5). [20][21][22] Coordinationo ft he carboxylate functions with as econdary metal salt leads to various well-defined MOF subunit arrangements in which metal-NHC complexes are covalentlyb ound to the linkers ( Figure 6).…”