93080-29-6Relevant academic research and scientific papers
Heterogeneous ring-opening reactions and Knoevenagel condensation reactions with cobalt complexes: Effect of CoII versus CoIII states on catalysis
Kumar, Sushil,Gupta, Rajeev
, p. 843 - 852 (2020/06/26)
This work illustrates comparative catalytic performance of two sets of cobalt complexes within a common macrocyclic ligand environment: CoII complexes 1 and 2 versus CoIII complexes 3 and 4. All four cobalt complexes functioned as the heterogeneous catalysts for the ring-opening reactions of assorted epoxides as well as Knoevenagel condensation reactions of assorted aldehydes. Cobalt(II) complexes were noted to be the superior catalysts over cobalt(III) complexes for both types of organic transformations. The observed difference in the catalytic performance of two sets of cobalt complexes has been related to the kinetic differences between CoII versus CoIII ions. All four cobalt complexes display high catalytic efficiency and excellent reusability without any apparent loss in the catalytic performance.
Mesoporous Titania-Iron(III) Oxide with Nanoscale Porosity and High Catalytic Activity for the Synthesis of β-Amino Alcohols and Benzimidazole Derivatives
Roy, Susmita,Banerjee, Biplab,Salam, Noor,Bhaumik, Asim,Islam, Sk. Manirul
, p. 2689 - 2697 (2015/09/15)
A mesoporous TiO2-Fe2O3 mixed oxide material (MTF-1E) with nanoscale porosity and a high BET surface area was synthesized using sodium dodecyl sulfate (SDS) as a structure-directing agent. The material was characterized by
Calcium trifluoroacetate as an efficient catalyst for ring-opening of epoxides by amines under solvent-free conditions
Outouch, Rachid,Rauchdi, Mariem,Boualy, Brahim,El Firdoussi, Larbi,Roucoux, Alain,Ali, Mustapha Ait
, p. 67 - 72 (2014/04/17)
Ca(CF3CO2)2 efficiently catalyzed the selective ring-opening of epoxides by amines leading to the synthesis of β-aminoalcohols. The reaction works well with various aromatic and aliphatic amines under solvent-free conditions. Corresponding β-aminoalcohols were obtained in excellent yields with high regioselectivity. The catalyst was easily prepared by reaction of CaH 2 in trifluoroacetic acid.
Quaternary ammoniums and a cationic sodium complex as supramolecular catalysts in ring-opening of epoxides by amines
Thomas, Coralie,Brut, Sébastien,Bibal, Brigitte
, p. 1646 - 1650 (2014/02/14)
Supramolecular ionic organocatalysts and a metal-based catalyst were investigated in the ring-opening of epoxides by amines, without any artifice to enhance conversion (i.e., solvophobic effect, extended reaction time, heating, excess of amine, high catalyst loading). Different β-amino-alcohols were obtained in satisfying conversion (50-80%) in 24 h, under mild conditions.
Highly efficient and versatile chemoselective addition of amines to epoxides in water catalyzed by erbium(III) triflate
Procopio, Antonio,Gaspari, Marco,Nardi, Monica,Oliverio, Manuela,Rosati, Ornelio
, p. 2289 - 2293 (2008/09/18)
Er(OTf)3 is proposed as a highly efficient and reusable catalyst for the opening of epoxides in water with aliphatic as well as aromatic amines leading to the synthesis of β-amino alcohols. The aqueous conditions employed in the present method will make it 'environmentally friendly' and potentially useful for industrial applications.
Dynamic kinetic resolution allows a highly enantioselective synthesis of cis-α-aminocycloalkanols by ruthenium-catalyzed asymmetric hydrogenation
Liu, Sheng,Xie, Jian-Hua,Wang, Li-Xin,Zhou, Qi-Lin
, p. 7506 - 7508 (2008/09/17)
(Chemical Equation Presented) Resolutely dynamic hydrogenation: A highly efficient asymmetric hydrogenation of racemic N,N-disubstituted α-aminocycloalkanones involving dynamic kinetic resolution in the presence of a ruthenium catalyst gives chiral α-aminocycloalkanols with excellent enantioselectivities and cis diastereoselectivities (see scheme). A synthesis of optically pure U-(-)-50488 based on this reaction is reported.
Hydrophobic amplification of noncovalent organocatalysis
Kleiner, Christian M.,Schreiner, Peter R.
, p. 4315 - 4317 (2007/10/03)
The effects of hydrogen-bonding organocatalysts and water for the acceleration of epoxide openings with a variety of nucleophiles are additive and lead to excellent yields of the catalyzed reactions in water. The Royal Society of Chemistry 2006.
Microwave-assisted aminolysis of epoxides under solvent-free conditions catalyzed by montmorillonite clay
Mojtahedi, Mohammad M.,Saidi, Mohammad R.,Bolourtchian, Mohammad
, p. 128 - 129 (2007/10/03)
The reaction of primary and secondary amines with epoxides in the presence of montmorillonite K10 clay, under solvent-free conditions and microwave irradiation affords high yields of β-amino alcohols.
Benzothiophenes
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, (2008/06/13)
This invention is related to novel benzothiophene compounds of formula I: which are useful for the inhibition of the various medical conditions associated with postmenopausal syndrome, as well as estrogen dependent diseases including cancer of the breast, uterus, and cervix. The present invention further relates to pharmaceutical formulations of compounds of formula I.
