- Method of preparing organomagnesium compounds
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The present invention is directed to a reagent for use in the preparation of organomagnesium compounds as well as to a method of preparing such organomagnesium compounds. The present invention furthermore provides a method of preparing functionalized or unfunctionalized organic compounds as well as the use of the reagents of the present invention in the preparation of organometallic compounds and their reaction with electrophiles. Finally, the present invention is directed to the use of lithium salts - LiY in the preparation of organometallic compounds and their reactions with electrophiles and to an organometallic compound which is obtainable by the disclosed method.
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Page/Page column 6-7
(2010/02/14)
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- Active Magnesium from Catalytically Prepared Magnesium Hydride or from Magnesium Anthracene and its Uses in the Synthesis
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Highly reactive, pyrophoric forms of magnesium with specific surface areas of 20-109 m2/g (Mg*) can be generated by the dehydrogenation of catalytically prepared magnesium hydride (MgH2*) or by decomposition of magnesium anthracene * 3 THF (4).The decomposition of 4, with recovery of anthracene and THF, may be accomplished both thermally and by ultrasound in an organic solvent (toluene, n-heptane) or thermally in the solid state in vacuo.Mg* obtained by the latter method exhibits only weak reflections in the X-ray powder diagram and has, in comparison to other mentioned Mg* species, the highest reactivity toward hydrogen.Diverse Grignard compounds can be prepared under mild conditions (* from MgH2* or 4.The cleavage of THF with formation of 1-oxa-2-magnesiacyclohexane (2) is possible by employing Mg* from NgH2* or 4.
- Bartmann, Ekkehard,Bogdanovic, Borislav,Janke, Nikolaus,Liao, Shijan,Schlichte, Klaus,et al.
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p. 1517 - 1528
(2007/10/02)
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- Effective Synthesis of 2-propionic Acid via Hydromagnesation Reaction with Nickel or Titanium Catalysts
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2-propionic acid was synthesized in 82percent yield via nickel(II) chloride or dichlorobis5-cyclopentadienyl>titanium-catalyzed hydromagnesation of 1-(3-methyl-2-butenyl)-4-vinylbenzene obtained in ca. 63-68percent yield by the coupling reaction of 4-(3-methyl-2-butenyl)phenylmagnesium chloride with vinyl chloride.
- Amano, Takehiro,Ota, Tomomi,Yoshikawa, Kensei,Sano, Tatsuhiko,Ohuchi, Yutaka,et al.
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p. 1656 - 1658
(2007/10/02)
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- Tetraarylboron-ammonium complexes and their uses
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New tetraarylboron-ammonium complexes having the general formula: STR1 wherein R1 represents a hydrogen or a halogen atom or a lower alkyl group; R2 represents a halogen atom or a lower alkyl or a lower alkenyl group; and R3/su
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