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"Pinet, Jean"
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Oppenauer-type oxidation of secondary alcohols catalyzed by homogeneous water-soluble complexes
The catalytic system composed of [Ir(COD)Cl]
2
, 2,2′-biquinoline-4,4′-dicarboxylic acid dipotassium salt (BQC), and sodium carbonate is highly efficient for the selective oxidation of benzylic, 1-heteroaromatic, aliphatic, and allylic secondary alcohols using catalyst:substrate ratios ranging from 0.4% to 2.5%. Sterically hindered allylic alcohols undergo selectively good conversions to the corresponding enones, while unhindered ones are completely isomerized to saturated ketones. Mercury tests indicate that the catalytic process is likely homogeneous. The mechanism proposed for this Oppenauer-type oxidation including the isomerization process is based on iridium-alkoxide species.Key words: Oppenauer oxidation, water, catalysis, isomerization, secondary alcohols.
Journal Article
Oppenauer-type oxidation of secondary alcohols catalyzed by homogeneous water-soluble complexes1
The catalytic system composed of [Ir(COD)Cl]^sub 2^, 2,2'-biquinoline-4,4'-dicarboxylic acid dipotassium salt (BQC), and sodium carbonate is highly efficient for the selective oxidation of benzylic, 1-heteroaromatic, aliphatic, and allylic secondary alcohols using catalyst:substrate ratios ranging from 0.4% to 2.5%. Sterically hindered allylic alcohols undergo selectively good conversions to the corresponding enones, while unhindered ones are completely isomerized to saturated ketones. Mercury tests indicate that the catalytic process is likely homogeneous. The mechanism proposed for this Oppenauer-type oxidation including the isomerization process is based on iridium-alkoxide species. [PUBLICATION ABSTRACT]
Journal Article
Alain Sterin, Les coopératives de la dernière chance. Le cas des fruits et légumes
Pinet Jean-Marc. Alain Sterin, Les coopératives de la dernière chance. Le cas des fruits et légumes.. In: Études rurales, n°41, 1971. p. 114.
Report
Michel Gutelman, L'agriculture socialisée à Cuba
Pinet Jean-Marc. Michel Gutelman, L'agriculture socialisée à Cuba.. In: Études rurales, n°33, 1969. pp. 94-99.
Report
J.-M. Boussard et M. Petit, Problèmes de l'accession à l'irrigation, étude économétrique d'une petite région
Pinet Jean-Marc. J.-M. Boussard et M. Petit, Problèmes de l'accession à l'irrigation, étude économétrique d'une petite région.. In: Études rurales, n°34, 1969. pp. 129-130.
Report
Data Collection from Buried Sensor Nodes by Means of an Unmanned Aerial Vehicle
The development of Wireless Underground Sensor Networks (WUSNs) is a recent research axis based on sensor nodes buried a few dozen centimeters deep. The communication ranges are, however, highly reduced due to the high attenuation of electromagnetic waves in soil, leading to issues of data collection. This paper proposes to embed a data collector on an Unmanned Aerial Vehicle (UAV) coming close to each buried sensor node. The whole system was developed (sensor nodes, data collector, gateway) and experimentations were carried out in real conditions. In hovering mode, the measurements on the RSSI levels with respect to the position of the UAV highlight the interest in maintaining a high altitude when the UAV is far from the node. In dynamic mode, the experimental results demonstrate the feasibility of carrying out the data collection task while the UAV is moving. The speed of the UAV has, however, to be adapted to the required time to collect the data. In the case of numerous buried sensor nodes, evolutionary algorithms are implemented to plan the trajectory of the UAV optimally. To the best of our knowledge, this paper is the first one that reports experiment results combining WUSN and UAV technologies.
Journal Article