نتایج جستجو برای: methyltrioxorhenium

تعداد نتایج: 45  

Journal: :Inorganica Chimica Acta 2006

Journal: :Bioorganic & medicinal chemistry 2005
Raffaele Saladino Cinzia Fiani Maria Cristina Belfiore Giampiero Gualandi Sabrina Penna Pasquale Mosesso

A novel and efficient procedure to prepare highly oxidised aryltetralin lignans, such as isopodophyllotoxone and (-)-aristologone derivatives, by oxidation of podophyllotoxin and galbulin with methylrhenium trioxide (MTO) and novel MTO heterogeneous catalysts is reported. It is noteworthy that in the case of isopodophyllotoxone derivatives the functionalisation of the C-4 position of the C-ring...

Journal: :Chemical reviews 2003
Benjamin S Lane Kevin Burgess

3. Soluble Metal Oxides 2459 3.1. Polyoxometalates 2459 3.2. Peroxotungstates 2459 3.3. Peroxomolybdates 2460 3.4. Methyltrioxorhenium 2461 3.5. Other Metal Oxides 2461 4. Metal Oxides Generated in Situ 2461 4.1. Selenium and Arsenic Compounds 2461 4.2. Simple Metal Salts 2462 5. Coordination Complexes 2463 5.1. Manganese Porphyrins 2463 5.2. Iron Porphyrins 2464 5.3. Manganese Salen Complexes ...

Journal: :Bioscience, biotechnology, and biochemistry 2009
Naokazu Kumura Hirotaka Furukawa Michiyo Kobayashi Arnold N Onyango Minoru Izumi Shuhei Nakajima Hye-Sook Kim Yusuke Wataya Naomichi Baba

Novel water-soluble conjugates of 1,2,4,5-tetraoxane bis(quaternary ammonium salts) were synthesized in a relatively stable crystalline form via four steps starting from methyltrioxorhenium-catalyzed endo-peroxidation of ethyl 4-oxocyclohexanecarboxylate with hydrogen peroxide in hexafluoro-2-propanol. The assay for the in vitro toxicity of water-soluble tetraoxanes 5a-5d to malaria parasites i...

Journal: :Physical chemistry chemical physics : PCCP 2011
Clara Stoeffler Benoît Darquié Alexander Shelkovnikov Christophe Daussy Anne Amy-Klein Christian Chardonnet Laure Guy Jeanne Crassous Thérèse R Huet Pascale Soulard Pierre Asselin

Originating from the weak interaction, parity violation in chiral molecules has been considered as a possible origin of biohomochirality. We have proposed the observation of molecular parity violation using the two-photon Ramsey fringes technique on a supersonic beam. As a first step in this direction, a detailed spectroscopic study of methyltrioxorhenium (MTO) has been undertaken. It is an ide...

Journal: :iranian journal of catalysis 2014
fatemeh niroomand hosseini

the thermodynamic of the known and very effective catalytic system, hydrogen peroxide (h2o2) and methyltrioxorhenium (mto) is studied in different solvents using uv-visible spectroscopic method. the thermodynamic parameters (δg, δh and δs) for two equilibrium reactions, mto + h2o2 ⇌ a + h2o and a + h2o2 ⇌ b.h2o (a, [mere(o)2(o2)]; b.h2o, [mere(oh2)(o)(o2)2]), are determined. the obtained free e...

Journal: :Dalton transactions 2014
Praveen K Khatri Shivani Choudhary Raghuvir Singh Suman L Jain Om P Khatri

A rhenium-oxo complex such as methyltrioxorhenium (MTO) has been homogeneously immobilized on a Schiff base modified graphene oxide (GrO) support via covalent bonding. The loading of MTO on GrO nanosheets was monitored by FTIR, TG-DTA, and elemental analyses. The developed heterogeneous catalyst is found to be efficient for the oxidation of various amines to the corresponding N-oxides using hyd...

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