Effective and Sustainable Access to Quinolines and Acridines: A Heterogeneous Imidazolium Salt Mediates C-C and C-N Bond Formation
作者:Patricia Gisbert、María Albert-Soriano、Isidro M. Pastor
DOI:10.1002/ejoc.201900880
日期:2019.8.15
A robust catalytic system mediates metal‐free and solvent‐free C–C and C–N bond formation by favoring the interaction between the reactants due to the presence of carboxylicacid moieties and chloride counterion, providing a sustainable protocol with appropriate environmental impact.
Versatile Barium and Calcium Imidazolium-Dicarboxylate Heterogeneous Catalysts in Quinoline Synthesis
作者:María Albert-Soriano、Paz Trillo、Tatiana Soler、Isidro M. Pastor
DOI:10.1002/ejoc.201700990
日期:2017.11.24
A variety of calcium- and barium-based heterogeneous catalysts have been prepared in a straightforward manner from readily available organic linkers and metal sources. The set of materials constitutes a valuable array of catalysts for organic transformations, opening up their practical use.
Anion‐Dependent Imidazolium‐Based Catalysts for Allylation of Aniline with Tunable Regioselectivity
作者:María Albert‐Soriano、Isidro M. Pastor
DOI:10.1002/adsc.202000102
日期:2020.6.15
Metal‐free catalysts based on 1,3‐bis(carboxymethyl)imidazolium halides mediate the reaction between allylic alcohols and anilines, providing the corresponding N ‐, 2‐ and 4‐allylaniline isomers selectively. The imidazolium counterion plays a crucial role in the outcome of the reaction. Thus, while the imidazolium chloride selectively provides the N ‐substituted aniline, the bromide and iodide imidazolium
Imidazolium-urea low transition temperature mixtures for the UHP-promoted oxidation of boron compounds
作者:Mario Martos、Isidro M. Pastor
DOI:10.1016/j.molliq.2021.118349
日期:2022.2
yl-3-methylimidazolium chloride and urea has been prepared and characterized by differential scanning calorimetry throughout its entire composition range. This LTTM has been employed for the oxidation of boron reagents using urea-hydrogen peroxide adduct (UHP) as the oxidizer, thus avoiding the use of aqueous H2O2, which is dangerous to handle. This metal-free protocol affords the corresponding alcohols
Processes for making zoledronic acid can be advantageously carried out in a solvent/diluent that comprises a mixture of (i) a polyalkylene glycol and (ii) a cyclic carbonate of the formula (3)
wherein n is an integer from 2 to 4, and R
1
and R
2
each independently represent a hydrogen or a C1-C4 alkyl group.