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Petit C.,University Claude Bernard Lyon 1 | Poli E.,Laboratoire Of Chimie | Favre-Reguillon A.,Laboratoire Of Genie Des Procedes Catalytiques | Favre-Reguillon A.,French National Conservatory of Arts and Crafts | And 5 more authors.
ACS Catalysis | Year: 2013

The reduction of tertiary phosphine oxides using tetramethyldisiloxane (TMDS) as a mild reducing agent and catalytic amount of TiIV isopropoxide has been studied in detail. An extensive EPR study has revealed the presence of at least five TiIII species, and structures have been proposed. Thus, a single electron transfer (SET) mechanism consisting of a back and forth oxido-reduction of Ti from the IV to the III oxidation state could be proposed. Reduction of TiIV produces a Si• that undergoes a O2- abstraction from PV compounds leading to PIII compounds and Si-O• species. Reoxidation of TiIII by the latter gives silanol species. This mechanism was further probed by 29Si NMR analysis of the reaction mixture as a function of time and by the reduction of optically active P-stereogenic tertiary phosphine oxides. A practical reduction protocol of Ph3PO with these environmentally benign reagents on a 100 g scale has been developed. © 2013 American Chemical Society.


Vanoye L.,Laboratoire Of Genie Des Procedes Catalytiques | Wang J.,Laboratoire Of Genie Des Procedes Catalytiques | Pablos M.,Laboratoire Of Genie Des Procedes Catalytiques | Philippe R.,Laboratoire Of Genie Des Procedes Catalytiques | And 3 more authors.
Organic Process Research and Development | Year: 2016

A continuous-flow microreactor is applied for the selective aerobic neat oxidation of 2-ethylhexanal. Under 7.5 bar of O2 and 10 ppm of Mn(II) as catalyst, a production of up to 130 g/h of 2-ethylhexanoic acid can be obtained with a PFA tubing of 7 m (Ø 1.65 mm, reactor volume ca. 15 mL). The synergistic use of alkali metal salts and Mn(II) as catalyst improve the selectivity up to 94% under those conditions. We show that the productivity of this simple tube microreactor is limited by the thermal management. © 2015 American Chemical Society.


Vanoye L.,Laboratoire Of Genie Des Procedes Catalytiques | Favre-Reguillon A.,Laboratoire Of Genie Des Procedes Catalytiques | Favre-Reguillon A.,French National Conservatory of Arts and Crafts | De Bellefon C.,Laboratoire Of Genie Des Procedes Catalytiques
Catalysis Science and Technology | Year: 2013

The purpose of these comments is to express some concern regarding the choice of the test reaction used to characterize the activity of some nanoporous aluminosilicate catalysts produced using an evaporation-induced self-assembly approach described in the recent Catal. Sci. Technol. paper of A. E. Graham et al. [2012, 2, 2258-2263]. © 2013 The Royal Society of Chemistry.


Vanoye L.,Laboratoire Of Genie Des Procedes Catalytiques | Pablos M.,Laboratoire Of Genie Des Procedes Catalytiques | De Bellefon C.,Laboratoire Of Genie Des Procedes Catalytiques | Favre-Reguillon A.,Laboratoire Of Genie Des Procedes Catalytiques | Favre-Reguillon A.,French National Conservatory of Arts and Crafts
Advanced Synthesis and Catalysis | Year: 2015

Aerobic oxidation using a combination of copper salts and 2,2,6,6-tetramethylpiperidine N-oxyl (TEMPO) represent useful tools for organic synthesis and several closely related catalyst systems have been reported. To gain further insights, these catalytic systems were evaluated in a gas-liquid segmented flow device. The improvement of oxygen mass transfer has a significant influence on the turnover-limiting step. Hence, an improved catalytic system using copper(II) as copper source was implemented in a microreactor for the safe and efficient oxidation of primary alcohol. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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