Higly efficienthydroarylation and hydroalkylation of styrenes with various arenes and 1,3-dicarbonyl compounds respectively have been developed using Amberlyst-15 as a heterogeneous catalyst. The ...
作者:Darapaneni Chandra Mohan、Rajendra D. Patil、Subbarayappa Adimurthy
DOI:10.1002/ejoc.201200283
日期:2012.6
The hydroarylation of styrenes with various arene(heteroarene) compounds using H-β-zeolite as a green and recyclable heterogeneous catalyst under mild reaction conditions has been developed. The catalyst showed versatility and high selectivity (up to 100 %) of desired 1,1-diarylalkanes in cyclohexane as solvent under the conditions studied. The catalyst could be reactivated by simple treatment with
An expeditious and highly practical, microwave assisted benzylation of naphthols and 4-hydroxycoumarin has been developed under catalyst-free & solvent-free conditions. Alcohols undergo heat induced dehydration to form ethers, which collapse reversibly to form the carbocation which was captured immediately by a suitable nucleophile to furnish the benzylated compounds.
KHSO4: a highly efficient and reusable heterogeneous catalyst for hydroarylation of styrenes
作者:Rajendra D. Patil、Girdhar Joshi、Subbarayappa Adimurthy
DOI:10.1007/s00706-010-0369-2
日期:2010.10
AbstractHydroarylation of styrenes with arenes/heteroarenes using KHSO4 (10 mol%) as an efficient heterogeneous catalyst is described. High conversion and selectivity (>99%) were observed for hydroarylation of styrenes with 2-naphthol at reflux temperature of 1,2-dichloroethane. Yields were quantitative with all styrenes. Moderate to good conversions and selectivities were achieved with other aromatics
Pincer‐Ruthenium Catalyzed Oxygen Mediated Dehydrative Etherification of Alcohols and
<i>Ortho</i>
‐Alkylation of Phenols
作者:Kanu Das、Eileen Yasmin、Akshai Kumar
DOI:10.1002/adsc.202200780
日期:2022.11.22
formulated for the selective etherification of secondary alcohols catalyzed by NNN pincer-ruthenium(II) carbonyl complexes based on bis(imino)pyridine ligands in the presence of molecular oxygen under solvent-free and base-free conditions at 140 °C. Under these conditions, very high yields (up to 92%, ca. 6133 TON) of the corresponding ethers are obtained at a very low catalyst loading (ca. 0.015 mol%)