Concept

Lewis acids and bases

Related publications (199)

Preparation of (ethylene)-(propylene)-triaminepentaacetic acid derivatives for use in the production of pharmaceutical agents

André Merbach, Eva Jakab Toth, Sabrina Laus

The invention relates to a novel class of ligands, complexes comprising such ligands and a metal ion, and adducts of these metal complexes and a macromolecule. Pharmaceutical compositions and methods of making and using the ligand-metal complexes are also ...

2003

Implication of the Acid-Base Properties of V/Ti-oxide Catalyst in Toluene Partial Oxidation

Albert Renken, Lioubov Kiwi, Fabio Rainone

The work presents the effect of K-doping on V/Ti-oxides taking into account: the surface acid–base properties and the structure of surface vanadia species in respect to the catalyst performance and deactivation. The structure of active surface species dete ...

2002

Extending the Coordination Chemistry of Molecular P4S3: The Polymeric Ag(P4S3)+ and Ag(P4S3)2+ Cations

Upon reacting P4S3 with AgAl(hfip)4 and AgAl(pftb)4 [hfip = OC(H)(CF3)2; pftb = OC(CF3)3], the compds. Ag(P4S3)Al(hfip)4 (1) and Ag(P4S3)2+[Al(pftb)4]- (2) formed in CS2 or CS2/CH2Cl2 soln., resp. Compds. 1 and 2 were characterized by single-crystal x-ray ...

2002

The basicity gradient-driven migration of iodine: conferring regioflexibility on the substitution of fluoroarenes

Thierry Rausis

Six different fluoroarenes were submitted to the same transformations. Direct deprotonation with alkyllithium or lithium dialkylamide as reagents and subsequent carboxylation afforded acids. These included 2,6-difluorobenzoic acid, 3,6-difluoro-2-iodobenzo ...

2002

The [3+2] cycloaddition of diphenyldiazomethane and ethyl diazoacetate with itaconic anhydride. A new access to spiranic cyclopropane derivatives

Christophe Roussel

The reaction of itaconic anhydride with N2:CHCO2Et or Ph2C:N2 gave the expected spiro-derivs., which spontaneously rearranged; specifically, the adduct from Ph2C:N2 loses a dinitrogen mol., yielding a spirocyclopropane related to the known 5-azaspiro[2.4]h ...

2002

Regiochemical flexibility: the optional functionalization of 2,3,5-trihalopyridines at the 4- or 6-position

Carla Bobbio

A deprotonation study was performed using 2,3,5-trichloropyridine, 3,5-dichloro-2-fluoropyridine, and 5-chloro-2,3-difluoropyridine as the substrates. Upon reaction with lithium diisopropylamide (LDA), deprotonation occurred exclusively at the 4-position. ...

2001

The lock-in phase in the urotropine-sebacic acid system

Gervais Chapuis

The 1,10-decanedioic acid-1,3,5,7-tetraazatricyclo[3.3.1.1(3,7)]decane (1/1) system, C10H18O4.C6H12N4, was studied at 215 (2) K. Its analysis provides important information with regard to the long-standing acid-carboxylate controversy in the urotropine-alk ...

2001

The reaction of alkenes with triangulo-clusters [Pt3(m-CO)3(PR3)3]

Gabor Laurenczy, Raymond Roulet

The reactions of the cluster complexes [Pt-3(mu -Co)(3)L-3], where L = PPh3 1a, PPh(2)Bz 1b and PCy3 1c, with activated mono-olefins have been studied under preparative and equilibrium conditions. At low temperature the olefins react quantitatively giving ...

2001

Oxidation of carboxylic acids at boron-doped diamond electrodes for wastewater treatment

Christos Comninellis, Pierre-Alain Michaud

Thin boron-doped diamond films were prepd. by HF CVD (hot filament chem. vapor deposition technique) on conductive p-Si substrate (Si/diamond). The morphol. of these Si/diamond electrodes was investigated by SEM and Raman spectroscopy. The electrochem. beh ...

2000

Asymmetric syntheses of new polyhydroxylated quinolizidines: Cross-aldol reactions of 7-oxabicyclo[2.2.1]heptan-2-one and 3a,4a,7a,7b-tetrahydro[1,3]dioxolo[4,5]furo[2,3-d]isoxazole-3-carbaldehy de derivatives

Pierre Vogel

The cross-aldolization of (-)-(1S,4R,5R,6R)-6-endo-chloro-5-exo-(phenylseleno)-7-oxabicyclo[2.2.1] heptan-2-one ((-)-25) and of(+)-(3aR,4aR,7aR,7bS)- ((+)-26) and(-)-(3aS,4aS,7aS,7bR)-3a,4a,7a,7b-tetrahydro-6,6-dimethyl[1,3]dioxolo [4,5]furo[2,3-d]isoxazol ...

2000

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