175798-92-2Relevant academic research and scientific papers
Asymmetric aldol reaction using immobilized proline on mesoporous support
Calderon, Felix,Fernandez, Raquel,Sanchez, Felix,Fernandez-Mayoralas, Alfonso
, p. 1395 - 1403 (2005)
The aldol reaction of hydroxyacetone with different aldehydes using immobilized proline on a mesoporous support, assisted by heat and microwaves, has been explored. It was found that heterogenized L-proline on MCM-41 catalyzed aldol reactions in both hydr
Heterogenised catalysts on zeolites. Synthesis of new chiral Rh(I) complexes with (2S,4R)-trans-4-RCOO-2-(t-butylaminocarbonyl) pyrrolidines and (2S,4S)-cis-4-RCONH-2-(t-butylaminocarbonyl) pyrrolidines. Heterogenisation on silica and a USY-zeolite and study of the role of support on their catalytic profile in hydrogenation of olefins
Corma,Iglesias,Mohino,Sanchez
, p. 147 - 156 (2007/10/03)
Novel chiral ligands (2S,4R)-2-(t-butylaminocarbonyl)-4-[3-(alkylaminocarbonyl)propanoyloxy]pyrrolidine and (2S,4S)-cis-4-(alkylaminocarbonylamino)-2-(t-butyl-aminocarbonyl)pyrrolidine (4a,b; 9a,b), (a: alkyl = t-butyl; b: alkyl = 3-triethoxysilylpropyl) and their rhodium complexes were synthesised and characterised. The reactions of [{Rh(cod)Cl}2] and [RhCl(PPh3)3] with the chiral ligands in the presence of a non-coordinating anion (PF-6) gave the cationic complexes [Rh(L2)(ligand)][PF6] (L2 = cod, PPh3). The structures of these complexes were elucidated by elemental analyses, IR spectroscopy and 1H, 13C and 31P NMR measurements. The metal complexes bearing a triethoxysilyl group were covalently bonded to silica and modified USY-zeolite and Rh-heterogenised complexes were obtained. A comparative study (homogeneous versus supported) was made for the catalytic activity in hydrogenation reactions.
