Abstract
The Pd-catalyzed aminocarbonylation as well as hydroxycarbonylation of terminal alkynes was achieved with aid of a sulfonate-built-in zwitterionic phosphine (L2), under acid-additive free condition. With L2-Pd(OAc)2 catalytic system, the terminal alkynes smoothly converted to the corresponding α,β-unsaturated carbonyl compounds (amides or carboxylic acids) in moderate to excellent isolated yields, with 100 % branched regio-selectivity. It was believed that L2 with the matched steric-demand and the bulit-in-SO3--unit not only tuned the catalytic performance of Pd(OAc)2 to activate CO and alkyne but also exhibited the synergetic activating ability towards the nucleophiles of (primary/secondary) amines or H2O via developing hydrogen-bond interaction, which facilitated the observed successful carbonylation. It means the developed L2-Pd(OAc)2 system could serve as a bifunctional catalyst.
| Original language | English |
|---|---|
| Article number | 115321 |
| Journal | Molecular Catalysis |
| Volume | 585 |
| DOIs | |
| State | Published - Oct 2025 |
Keywords
- Aminocarbonylation
- Bifunctional catalyst
- Hydroxycarbonylation
- Sulfonate-built-in-phosphine
- Zwitterionic ligand