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Document Title |
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7405262 |
A process for preparing a functionalized polymerization initiator, the process comprising combining a functionalized styryl compound and an organolithium compound.
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7326372 |
A method for the production of alkyl lithium compounds is disclosed, in which metallic lithium is reacted with an alkyl halide in a solvent, whereby the metallic lithium is introduced in the form of lithium particles, generated by sprayi...
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7311759 |
A two-stage process is provided for purifying off-gases from a high-pressure melamine plant. In the first stage, the off-gases are contacted with a recirculated urea melt containing melamine precursors and NH 3 . In the second stage, the...
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RE39532 |
The novel metallocenes of the formula I
in which, preferably, M 1 is Zr or Hf, R 1 and R 2 are alkyl or halogen, R 3 and R 4 are hydrogen, R 5 and R 6 are alkyl or haloalkyl, —(CR 8 R 9 ) m —R 7 —(CR 8 R 9 ) n — is a ...
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7175784 |
Disclosed is a method for producing Alkyllithium compounds by reacting metallic lithium with an Alkyl halide in a solvent. The reaction is performed at a reduced pressure at the boiling point of the solvent.
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7005083 |
A process for preparing alkyllithium compounds by reacting a sodium-lithium alloy with alkyl halides at temperatures of about 50 to 125° C.
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6994800 |
Volatile liquid precursors are provided for use in the formation of alkali metal-containing materials. The compound includes an alkali metal and an amide ligand and is a liquid at a temperature of less than about 70° C.
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6969772 |
A fullerene derivative, with a solubility in n-hexane of not lower that 0.1 mg/ml at 25° C., includes a fullerene skeleton and three or more organic groups attached to the fullerene skeleton, where each of the organic groups is represen...
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6861011 |
Methyllithium is prepared by reacting chloromethane with a dispersion lithium metal in an aromatic organic solvent with methyltetrahydrofuran.
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6841095 |
A chemical plant for performing a chemical reaction between particles of a material such as lithium metal, and a reagent such as butyl chloride in solution in hexane, in which one reaction product is a solid material, includes a reaction...
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6797182 |
A process for the purification of organometallic compounds or heteroatomic organic compounds from oxygen, water and from the compounds deriving from the reaction of water and oxygen with the organometallic or heteroatomic compounds whose...
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6787661 |
The present invention relates to a tin-containing organolithium compound which can be used as anionic polymerization initiators, represented by the following formula (1): R 4−x Sn(Y a —Z m —Y b —Li) x (1) Wherein R, Z and Y ar...
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6781007 |
The invention relates to a process for preparing partial hydrolysates of organometallic compounds and to a process for preparing partial hydrolysates of organometallic compounds, in particular alkylaluminoxanes, or transition metal catal...
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6686504 |
This invention discloses a process for making dilithium initiators in high purity. This process can be conducted in the absence of amines which is desirable since amines can act as modifiers for anionic polymerizations. The dilithium com...
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6660191 |
Bifunctional primer naphthalene compounds having the formula: wherein M″ is an alkali metal, preferably sodium or lithium, and R 1 and R 2 are, e.g., alkyl radicals, are prepared from corresponding 1,5-diethenylnaphthalene derivat...
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6653515 |
α,β,β-Trifluorostyrene and derivatives thereof synthesized in two steps from 1,1,1,2-tetrafluoroethylene. In the first step, 1,1,1,2-tetrafluoroethylene is reacted with a base, a metal salt such as zinc chloride and an optionally amin...
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6613858 |
A block copolymer having narrow molecular weight distribution and excellent symmetrical property or a telechelic polymer having, equally at both terminals thereof, a functional group can be produced by using a polymerization initiator so...
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6562923 |
The present invention relates to a process for the preparation of a dilithiated initiator usable in anionic polymerization, a process for the preparation by anionic polymerization of a living diene elastomer which is provided with a carb...
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6544446 |
A method of preparing magnesium alcoholates Mg(OR) 2 (where R=alkyl residue having 2 to 10 carbon atoms) is described. Addition products of 1,3-dienes to magnesium metal in a polar, aprotic solvent are reached with an alcohol R—OH.
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6509474 |
The invention relates to a method of lithiating CH-acidic five-membered heterocycles whereby the five-membered heterocycle is reacted with metallic lithium in an ether-containing solvent in the presence of an H acceptor.
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6495064 |
This patent describes a solution of ethyllithium in dibutyl ether, a non-pyrophoric solution of ethyllithium in dibutyl ether in a concentration of 7 to 8%, a non-pyrophoric solution of ethyllithium in dibutyl ether and in a hydrocarbon ...
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6492561 |
Alkaline earth metal alkylene diamides of Ba, Sr, Ca and a method for their production.
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6455718 |
Chloropentafluorobenzene or bromopentafluorobenzene is formed by heating perhalobenzene, C 6 F n X 6-n where n is 0 to 4, and each X is, independently, a chlorine or bromine atom, with alkali metal fluoride, and an aminophosphonium cata...
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6441258 |
A method for producing 1,2-bis(indenyl)ethanes in good yield is described. An agent and its application for isomerizing kinetic EBI to thermodynamic EBI and for isomerizing meso TMS-EBI to rac TMS-EBI are exemplified.
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6432326 |
A process for the stereoselective preparation of Grignard compounds of the formula I and polymer-bonded compounds of the formula Ia is described. The process can be used for producing substance reference libraries and the compounds of th...
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6420584 |
Ortho-substituted arylmetal compounds are prepared by deprotonation of aromatics which have a hydrogen atom in the ortho position relative to at least one halogen atom, one trifluoromethoxy group, one dialkylamino group, one nitrile grou...
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6399727 |
Polymerization initiator comprising an alkaline earth metal compound chosen from the group a) of heteroleptic alkaline earth metal compounds of the formula I L—M—R (I) or b) of cationic alkaline earth metal complexes of the formul...
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6348166 |
A process for the preparation of bisorganoalkaline earth metal compounds comprises reacting an organometallic compound R n M 2 with an alkaline earth metal salt M 1 X m .
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6261482 |
The invention relates to a method for producing organo alkali-metal compounds by reacting metal lithium, sodium or potassium with organic compounds containing at least one acidic CH bond in a solvent. The inventive method is characterize...
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6241917 |
Chloropentafluorobenzene or bromopentafluorobenzene is formed by heating perhalobenzene, C 6 F n X 6 -n where n is 0 to 4, and each X is, independently, a chlorine or bromine atom, with alkali metal fluoride, and an aminophosphonium ca...
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6231790 |
Pentafluorophenyl Grignard reagents are reacted with a boron trihalide in a non-ethereal solvent such as toluene to produce a tetrakis pentafluorophenyl borate magnesium halide.
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6217798 |
This invention is a process for making a difunctional lithium initiator which comprises reacting a secondary or tertiary lithium alkyl with a diisopropenylbenzene compound in the presence of diethyl ether at a temperature of 25 to 50° C...
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6080888 |
Arylolefinic compounds are prepared by reacting aryl halide with an olefinic compound in the presence of a polar liquid reaction medium containing (a) secondary or tertiary amine as a hydrogen halide acceptor (b) a catalyst system formed...
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6054628 |
In a process for carrying out an exothermal reaction, selected from the addition reaction of organomagnesium halide compounds to carbonyl compounds and the ensuing hydrolysis of the addition product, a considerable fraction of the heat l...
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6046346 |
A process for producing an alkali metal cyclopentadienylide is disclosed which comprises reacting in a solvent an alkali metal hydride with a disubstituted or trisubstituted 1,3-cyclopentadiene. Further, a process for producing a dihalob...
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6024897 |
There is disclosed a method of preparing benzyl metal compounds represented by general formula (2), comprising reacting a phenyl metal compound represented by general formula (1) with toluene, in the presence of a catalytic amount of ami...
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5976403 |
A process for producing dispersions of atmospherically stable, coated alkali metal particles and atmospherically stable, coated alkali metal powders by agitating a mixture of molten alkali metal in a hydrocarbon oil at dispersion speeds,...
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5872272 |
The present invention relates to polyvalent metal salts of a phosphoric diester represented by formula (1) and organo(poly)siloxanes modified with a polyvalent metal salt of a phosphoric diester having the structural units represented by...
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5831106 |
A process for preparing metallocene complexes of the general ##STR1## in which the substituents have the following meanings: M is titanium, zirconium, hafnium, vanadium, niobium or tantalum, X is fluorine, chlorine, bromine, iodine...
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5821307 |
A process for the preparation of hydrocarbon solutions of monofunctional ether initiators of the following general structure: M--Q n --Z--OA(R 1 R 2 R 3 ) wherein M is defined as an alkali metal, selected from the group consisting o...
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5792886 |
In producing (±)-2-(6-methoxy-2-naphthyl)propionic acid or precursor thereof from 2-bromo-6-methoxynaphthalene, use is made of 2-bromo-6-methoxynaphthalene formed by (a) methylating 6-bromo-2-naphthol with methyl chloride in a solvent c...
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5779942 |
This dialkylmagnesium is represented by the formula R--(CH 2 --CH 2 ) n --Mg--(CH 2 --CH 2 ) n ' --R', (E--O--E') x , where R and R' each independently represent a C 1 -C 20 hydrocarbon residue, branched or not, substituted or not, ...
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5776369 |
A process for producing dispersions of atmospherically stable, coated alkali metal particles and atmospherically stable, coated alkali metal powders by agitating a mixture of molten alkali metal in a hydrocarbon oil at dispersion speeds,...
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5750055 |
A process for the preparation of an efficient industrial organolithium diinitiator, comprising the reaction of two equivalents of a mono-organolithium initiator with one equivalent of 1,3-diisopropenyl benzene at a temperature in the ran...
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5744071 |
The present invention provides processes for making alkynyl ketones and precursors thereof, using less expensive reagents and/or hydrocarbon solvents and/or higher temperatures.
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5731107 |
The invention relates to a polyacetylene-lithium insertion compound, its use in a storage battery and a process for the preparation of polymer-lithium insertion compounds. This insertion compound contains at least six CH groups per lithi...
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5730910 |
A method of preparing polymetalated compositions and the use of such polymetalated compounds as catalysts in polymerization reactions are described. The process comprises reacting (A-1) an allenic compound of the formula R 2 --CHC...
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5726264 |
A process to produce an ethylene-bridged-metallocene-transition-metal compound that has an omega-alkenyl substitution on said ethylene bridge is provided. Said process comprises: contacting a diolefin compound with a peracid compound to ...
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5708092 |
A process for the preparation of hydrocarbon solutions of monofunctional ether initiators of the following general structure: M--Q n --Z--OA(R 1 R 2 R 3 ) wherein M is defined as an alkali metal, selected from the group consisting o...
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5689017 |
Preparation of a monolithium acetylide/ammonia complex by the reaction of lithium amide and acetylene in ammonia, by carrying out the reaction at a temperature of from -10° to 30° C.
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