17983-62-9Relevant articles and documents
Application of a promiscuous Arthrobacter sp. from Antarctic in aerobic (R)-selective deracemization and anaerobic (S)-selective reduction
Palmeira, Dayvson J.,Arajo, Lidiane S.,Abreu, Juliana C.,Andrade, Leandro H.
, p. 117 - 125 (2015/02/19)
Inspired by enzyme-catalyzed reactions with microorganisms found in harsh marine environments, in which the amount of oxygen is restrict, we have shown that Arthrobacter sp. can perform different chemical transformations by switching from anaerobic to aerobic reaction conditions. Depending on the presence or absence of oxygen, either alcohol deracemization or ketone reduction with enantiocomplementary selectivities can be performed by the same microorganism. For example, reactions performed in the presence of oxygen favored the deracemization process, in which a racemic mixture of 1-(4-methylphenyl)ethanol was enriched to the (R)-alcohol in high conversion (94%) and high enantiomeric excess (94%). On the other hand, reaction in the absence of oxygen favored the reduction process, in which 4-methyl-acetophenone was converted to the (S)-alcohol in good conversion (58%) and excellent enantiomeric excess (>99%). These concepts were applied for both deracemization and enantioselective reduction of heteroatom-containing (silicon, phosphorus, tin and boron) molecules. Moreover, preparative scale reactions were also performed for both chemical processes.
Heterocyclic dihydrazole compounds and their use for controlling fungal plant diseases
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, (2008/06/13)
PCT No. PCT/US96/06533 Sec. 371 Date Nov. 13, 1997 Sec. 102(e) Date Nov. 13, 1997 PCT Filed May 8, 1996 PCT Pub. No. WO96/36633 PCT Pub. Date Nov. 21, 1996Compounds of Formula I, and their N-oxides and agriculturally suitable salts, are disclosed which ar
Synthese d'aryl- et heteroarylsilanes par scission de l'hexamethyldisilane
Babin, P.,Bennetau, B.,Theurig, M.,Dunogues, J.
, p. 135 - 138 (2007/10/02)
In the presence of hexamethylphosphormaide and a catalytic quantity of tetrakis(triphenylphosphine)palladium, hexamethyldisilane reacts with various functional aryl bromides to give the corresponding arylsilanes in satisfactory yields.The reaction has bee