commercial Pd/C catalyst. The good reactivity in the biomass-derived solvent (GVL) confirms that the Pd/PiNe heterogeneouscatalyst is a valid system that can be integrated into a waste valorization chain within a circular economy approach. In addition, the efficiency of the catalyst has also been extended to perform the challenging consecutive Hiyama–Heck reaction to afford differently substituted (E)-1
CO/C-H as an Acylating Reagent: A Palladium-Catalyzed Aerobic Oxidative Carbonylative Esterification of Alcohols
作者:Lu Wang、Yanxia Wang、Chao Liu、Aiwen Lei
DOI:10.1002/anie.201400612
日期:2014.5.26
A palladium‐catalyzed oxidativecarbonylativeesterification of a variety of functionalized alcohols under base‐ and ligand‐free conditions has been demonstrated. A CO/olefin combination was utilized as the acylatingreagent with O2 as a benign oxidant. Notably, the scope of the substrate alcohols has been greatly broadened.
catalyzed C–O bond cleavage leading to the preparation of functional esters in the presence of N-methylpyrrolidin-2-one (NMP) was accomplished. Various substrates were well tolerated, and a gram-scale experiment was successfully realized. DFT calculations indicated that NMP plays a decisive role in accelerating nucleophilic attack of the functional acid to generate the functional esters in chlorobenzene
Imidazolium ionic liquid-tagged palladium complex: an efficient catalyst for the Heck and Suzuki reactions in aqueous media
作者:Pankaj Nehra、Bharti Khungar、Kasiviswanadharaju Pericherla、S. C. Sivasubramanian、Anil Kumar
DOI:10.1039/c4gc00525b
日期:——
soluble, and efficient ionic liquid-tagged Schiffbasepalladiumcomplex was prepared. The synthesized complex was well characterized by NMR, mass spectrometry, FT-IR, UV-visible spectroscopy and powder X-ray diffraction. The complex was used as a catalyst for the Suzuki and Heck cross-coupling reactions in water. Good to excellent yields were achieved using a modest amount of the catalyst. In addition
mediate ester synthesis from carboxyl acids and alcohols/phenols. Carboxylic acids are transformed to trifluoromethyl ester and acyl fluoride activated species that interact with each other. The broad substrate scope and late-stage application of this method are demonstrated. This study opens up new opportunities to develop interesting reactionsusing Cu(III)–CF3 compounds without transferring a CF3
Cu( III )–CF 3化合物在本文中被报道为新型偶联剂,可介导羧酸和醇/酚的酯合成。羧酸转化为三氟甲酯和酰基氟活化物质,它们相互作用。证明了该方法的广泛底物范围和后期应用。这项研究开辟了新的机会,可以使用 Cu( III )–CF 3化合物开发有趣的反应,而无需将 CF 3基团转移到产品中。