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| Number | Title | Issue Date |
| 8057714 | Synthesis method of metal cyclopentadienide in bulk The present invention relates to a synthesis method of metal cyclopentadienide by direct reaction of dicyclopentadiene with a group 1 metal in the presence of an aprotic solvent. Unlike the conventional method depending on retro Diels-Alder reaction of dicyclopentad... | 11/15/2011 |
| 7794632 | Process for the preparation of pure aryllithium compounds and their use A process is described for preparing aryllithium compounds by reaction of metallic lithium in an ether-containing solvent with an aryl halide, wherein prior to or at the beginning of the reaction a catalyst is added, the catalyst containing a halogen-free, polynucle... | 09/14/2010 |
| 7744784 | Method for preparing diorganomagnesium-containing synthesis means A diorganomagnesium-containing synthesis means, a method for its preparation and its use. ... | 06/29/2010 |
| 7638074 | Precursor compositions for atomic layer deposition and chemical vapor deposition of titanate, lanthanate, and tantalate dielectric films Barium, strontium, tantalum and lanthanum precursor compositions useful for atomic layer deposition (ALD) and chemical vapor deposition (CVD) of titanate thin films. The precursors have the formula M(Cp)2, wherein M is strontium, barium, tantalum or lanth... | 12/29/2009 |
| 7635441 | Raw material for forming a strontium-containing thin film and process for preparing the raw material The present invention provides a raw material for forming a strontium-containing thin film of a cyclopentadienyl-based strontium compound, which is in the liquid state at room temperature to 50° C., can be purified by distillation, present as a monomer, has high va... | 12/22/2009 |
| 7611647 | Process for the selective deprotonation and functionalization of 1-fluoro-2-substituted-3-chlorobenzenes 1-Fluoro-2-substituted-3-chlorobenzenes are selectively deprotonated and functionalized in the position adjacent to the fluoro substituent. ... | 11/03/2009 |
| 7405262 | Preparation of functionalized anionic polymerization initiators A process for preparing a functionalized polymerization initiator, the process comprising combining a functionalized styryl compound and an organolithium compound. ... | 07/29/2008 |
| 7326372 | Method for the production of alkyl lithium compounds by means of spraying of lithium metal 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 spraying molten lithium into an ine... | 02/05/2008 |
| 7311759 | Process for purifying off-gases of a melamine plant 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 NH3. In the second stage, the off-gases are conta... | 12/25/2007 |
| RE39532 | Metallocenes containing ligands of 2-substituted indenyl derivatives, process for their preparation, and their use as catalysts The novel metallocenes of the formula I in which, preferably, M1 is Zr or Hf, R1 and R2 are alkyl or halogen, R3 and R4 are hydrogen, R5 and R6 are alky... | 03/27/2007 |
| 7175784 | Method for the production of alkyl lithium compounds by using reduced pressure 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. ... | 02/13/2007 |
| 7166747 | Synthesis of soluble functionalized lithium initiators 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 compounds made are highly desira... | 01/23/2007 |
| 7026478 | Iron catalyzed cross coupling reactions of aromatic compounds A process for the production of compounds Ar—R1 by means of a cross-coupling reaction of an organometallic reagent R1-M with an aromatic or heteroaromatic substrate Ar—X catalyzed by one or several iron salts or iron complexes as catalysts ... | 04/11/2006 |
| 7005083 | Process for the preparation of alkyllithium compounds A process for preparing alkyllithium compounds by reacting a sodium-lithium alloy with alkyl halides at temperatures of about 50 to 125° C. ... | 02/28/2006 |
| 6994800 | Liquid precursors for formation of materials containing alkali metals 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. ... | 02/07/2006 |
| 6943250 | Protected aminofunctionalized polymerization initiators and methods of making and using same Anionic polymerization initiators useful in the preparation of polymers having a protected amine functional group. The amine functionality is part of a heterocyclic radical and includes a protecting group. ... | 09/13/2005 |
| 6939923 | Resin for solid phase synthesis A method for functionalizing a crosslinked polymer bead. The method comprises the steps of: (a) swelling the bead in a first solvent or solvent mixture to a volume from 200% to 310% of its volume when dry; and (b) contacting the bead with a functionalizing reagent i... | 09/06/2005 |
| 6861011 | Process for preparing methyllithium Methyllithium is prepared by reacting chloromethane with a dispersion lithium metal in an aromatic organic solvent with methyltetrahydrofuran. ... | 03/01/2005 |
| 6841095 | Chemical process and plant 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 vessel (12). Several ... | 01/11/2005 |
| 6797182 | Process for the purification of organometallic compounds or heteroatomic organic compounds with hydrogenated getter alloys 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 purification is sought, comp... | 09/28/2004 |
| 6787661 | Tin-containing organolithium compounds and preparation thereof The present invention relates to a tin-containing organolithium compound which can be used as anionic polymerization initiators, represented by the following formula (1): R4−xSn(Ya—Zm—Yb—Li)x | 09/07/2004 |
| 6781007 | Process for preparing partial hydrolysates of organometallic compounds or transition metal catalysts immobilized on inert support materials 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 catalysts immobilized on inert sup... | 08/24/2004 |
| 6686504 | Synthesis of soluble functionalized lithium initiators 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 compounds made are hi... | 02/03/2004 |
| 6660191 | 1.5-Diethenylnaphthalene compounds and bifunctional primers for anionic polymerization prepared therefrom Bifunctional primer naphthalene compounds having the formula: ##STR1## wherein M" is an alkali metal, preferably sodium or lithium, and R1 and R2 are, e.g., alkyl radicals, are prepared from corresponding 1,5-diethenylnaphthalene der... | 12/09/2003 |
| 6653515 | Synthesis of , ଲ, ଲ-trifluorostyrene via in-situ formation of trifluorovinyl metal halide ,ଲ,ଲ-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 amine t... | 11/25/2003 |
| 6613858 | Solution of dilithium polymerization initiator 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 solution which compr... | 09/02/2003 |
| 6562923 | Process for the preparation of a dilithiated initiator and anionic polymerization process 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 carbon-lithium group a... | 05/13/2003 |
| 6509474 | Method of lithiating five membered heterocycles 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.... | 01/21/2003 |
| 6495064 | Ethyllithium in dibutyl ether 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 in a concentration... | 12/17/2002 |
| 6492561 | Alkaline earth metal alkylene diamides, method for their production, and their use Alkaline earth metal alkylene diamides of Ba, Sr, Ca and a method for their production.... | 12/10/2002 |
| 6455718 | Halogen exchange reactions in preparing catalysts and their precursors Chloropentafluorobenzene or bromopentafluorobenzene is formed by heating perhalobenzene, C6 Fn X6-n where n is 0 to 4, and each X is, independently, a chlorine or bromine atom, with alkali metal fluoride, and an aminophosp... | 09/24/2002 |
| 6441258 | Synthesis and isomerization of 1,2-bis (indenyl) ethanes 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.... | 08/27/2002 |
| 6432326 | Method for the stereoselective production of grignard compounds and use thereof 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 the formulae I and I... | 08/13/2002 |
| 6420584 | Process for the preparation of ortho-substituted arylmetal compounds and their reaction with electrophilic reagents 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 group, one alkoxy grou... | 07/16/2002 |
| 6399727 | Heteroleptic alkaline-earth metal compounds and methods for carrying out stereoselective anionic polymerization 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 formula II [D.fwdarw.M--R]+ | 06/04/2002 |
| 6348166 | Method for producing di-organo alkaline-earth compounds A process for the preparation of bisorganoalkaline earth metal compounds comprises reacting an organometallic compound Rn M2 with an alkaline earth metal salt M1 Xm.... | 02/19/2002 |
| 6261482 | Method for producing organo-alkali metal compounds 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 characterized in that the reac... | 07/17/2001 |
| 6241917 | Halogen exchange reactions in preparing catalysts and their precursors Chloropentafluorobenzene or bromopentafluorobenzene is formed by heating perhalobenzene, C6 Fn X6-n where n is 0 to 4, and each X is, independently, a chlorine or bromine atom, with alkali metal fluoride, and an aminophosp... | 06/05/2001 |
| 6231790 | Tetrakis-pentafluorophenyl borates from pentafluorophenyl grignard reagents 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.... | 05/15/2001 |
| 6217798 | Method for synthesis of a dilithium diisopropenylbenzene-based diinitiator 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. wherein the mola... | 04/17/2001 |
