
	Where results make sense

Topic: Lithium diisopropylamide

Related Topics

Lithium salt

lithium carbonate

lithium hydroxide

lithium orotate

lithium ion

lithium chloride

lithium polymer cell

lithium aluminum hydride

Lithium stearate

lithium fluophosphate

Lithium, Missouri

In the News (Tue 29 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Stable lithium diisopropylamide and method of preparation - Patent 4595779
		A stable, nonpyrophoric form of lithium diisopropylamide, comprising lithium diisopropylamide in solution in the presence of tetrahydrofuran, wherein the mole ratio of tetrahydrofuran to lithium diisopropylamide is from 0.5:1 to 1.1.
		Lithium diisopropylamide (LDA) is widely used as a reagent in the preparation of pharmaceuticals and specialty chemicals.
		In preparing the lithium diisopropylamide in accordance with the preferred method of this invention, it has been found that significant improvements in yield are achieved by combining the majority of the total THF requirement with the electron carrier feed.
	www.freepatentsonline.com /4595779.html (4310 words)

	U.S. Patent: 5300252 - Ether free organometallic amide compositions - April 5, 1994
		Magnesium bisdiisopropylamide/lithium diisopropylamide mixtures are soluble up to about 90% lithium diisopropylamide with 10% added magnesium bisdiisopropylamide, but the maximum solubility does not exceed the total amide solubility of about 1.4 to 1.5 moles per liter.
		Interestingly, lithium diisopropylamide's solubility is maintained in the presence of magnesium bisdiisopropylamide in such hydrocarbon solvents in the absence of ethers for limited periods of time, even at cold temperatures.
		Such hydrocarbon-soluble bimetallic lithium magnesium diisopropylamides are readily prepared by slow addition (with cooling) of an alkyllithium compound, such as n-butyllithium, dissolved in a hydrocarbon solvent such as cyclohexane, to a solution of magnesium bisdiisopropylamide in cyclohexane, containing diisopropylamine in a quantity equivalent to the n-butyllithium being added.
	www.everypatent.com /comp/pat5300252.html (3209 words)

	U.S. Patent: 5041640 - Process for mono-, di-, trisubstituted acetic acids - August 20, 1991
		A 1-L flask is charged with 2.6 g (330 mmol) of lithium hydride, 14.3 g (150 mmol) of anhydrous magnesium chloride, 31 g (300 mmol) of dry diisopropylamine and 300 mL of tetrahydrofuran (mixture bubbles gently--evolving hydrogen before addition of isobutyric acid).
		A solution of 42.0 g (1.00 mol) of lithium hydroxide monohydrate in 175 mL of water is placed in a 2-L flask fitted with a stirrer and condenser interrupted by a Barrett trap.
		A 2-L flask is charged with 21.6 g (200 mmol) of lithium valerate, 9.5 g (100 mmol) of anhydrous magnesium chloride and 250 mL anhydrous tetrahydrofuran (freshly distilled from sodium, benzophenone).
	www.everypatent.com /comp/pat5041640.html (3758 words)

	FMC Lithium @ ChemBuyersGuide.com, Inc.
		The future is eminently clear for a company intent on global leadership in lithium and associated technologies.
		We are known as the world’s lithium experts; however, our distinction comes not only from our technical prowess, but also from the level of commitment that our people make each and every day to every single customer in meeting their unique requirements.
		FMC Lithium is committed to providing complete solutions to eight major identifiable markets including: air treatment, construction, energy, fine chemicals, glass and ceramics, greases and lubricants, polymers, pool water treatment and within unique, high value specialty applications.
	www.chembuyersguide.com /partners/fmclithium.html (301 words)

	Lithium Chloride (Site not responding. Last check: 2007-10-08)
		Lithium/Thionyl Chloride and Lithium Sulfuryl Chloride cells are also known as liquid cathode lithium cells.
		All lithium cells and batteries made with cells larger than an AA size are He conceived a way of dehumidifying air by scrubbing it with a lithium chloride solution.
		Lithium chloride lithium chloride solution methyl phenyl acetate ethoxy benzene ethoxy benzene exporter lithium chloride exporter methyl phenyl acetate supplier ethoxy benzene exporter Basic information atomic structure and table of isotopes.
	www.myhalfpints.com /lithium-chloride.htm (272 words)

	'LITHIUM - Buy with discount lithium LITHIUM Buy lithium online..! - Cheap lithium!' (via CobWeb/3.1 ... (Site not responding. Last check: 2007-10-08)
		Lithium - 3k - 19 Apr lithium 2006 - - It's Elemental - 13k - - lithium The Element Lithium single is awesome, and I highly lithium recommend it.
		Lithium carbonate - 39k lithium lithium lithium lithium lithium lithium lithium - 19 Apr 2006 - - 59k - 32k - technique lithium lithium articles, lithium /a/010312_ lithium - 56k - - Li lithium lithium battery chemistry is the most abundant element lithium.
		lithium - 14k - 25k - - The Element Lithium lithium lithium lithium lithium [CD-SINGLE]: Music The lithium lithium ion battery of the lithium lithium lithium lithium lithium lithium lithium lithium - Lithium battery and The Funny.
	lithium.pharmasn.com.cob-web.org:8888 (611 words)

	Ether free organometallic amide compositions - Patent 4944894
		The composition of claim 1 in which R.sup.3 and R.sup.4 are the same and selected from primary, secondary and tertiary alkyl groups of 2 to 20 carbon atoms, cycloalkyl groups of 3 to 20 carbon atoms and aryl groups of 6 to 10 carbon atoms.
		Then additional steps are necessary in order to convert the insoluble complex (chloromagnesiumamide) through further reactions with either normal or secondary butyllithium to form an alkylmagnesium dialklamide followed by reaction with additional diisopropylamine to form the desired magnesium bisdiisopropylamide.
		Thus, 4.56 g (25 mmol) of benzophenone were placed in a 100 ml airless-ware (R) flask and then 50 ml of a 0.5 magnesium diisopropylamide solution (in cyclohexane) were added slowly over a 10 min.
	www.freepatentsonline.com /4944894.html (5785 words)

	FMC Lithium, manufacturer of lithium chemistry products. (Site not responding. Last check: 2007-10-08)
		speacilizing in Lithium Acetate, Lithium Aluminum Hydride, Lithium Amide, Lithium Benzoate, Lithium Borohydride,
		Lithium Bromide, Lithium Carbonate, Lithium Chloride, Lithium Chromate, Lithium Citrate,
		Lithium Diethylamide, Lithium Diisopropylamide, Lithium Dimethylamide, Lithium Fluoride, Lithium Hexamethyldisilazide,
	www.lithium.us (67 words)

	Lithium Diisopropylamide, 2 M Solution in Tetrahydrofuran / Heptane / Ethylbenzene, Chemistry Supplies and Laboratory ...
		Lithium Diisopropylamide, 2 M Solution in Tetrahydrofuran / Heptane / Ethylbenzene, Chemistry Supplies and Laboratory Chemicals
		Lithium Diisopropylamide, 2 M Solution in Tetrahydrofuran / Heptane / Ethylbenzene (L2005)
		The LAB DEPOT is your source for laboratory chemicals equipment and scientific supplies including Lithium Diisopropylamide, 2 M Solution in Tetrahydrofuran / Heptane / Ethylbenzene, reagent chemicals, research products and lab test kits for water purification and pH sampling.
	www.labdepotinc.com /chemical_details~pid~L2005.aspx (156 words)

	Advance Scientific and chemical - , chemical company, chemical compound, spectrum chemical, chemical distributor, ...
		Lithium Diisopropylamide, 2 M Solution in Tetrahydrofuran / Heptane / Ethylbenzene
		For Bulk quotations on "Lithium Diisopropylamide, 2 M Solution in Tetrahydrofuran / Heptane / Ethylbenzene", be sure to contact our Bulk Chemical Department at 1-800-524-2436.
		MSDS for Lithium Diisopropylamide, 2 M Solution in Tetrahydrofuran / Heptane / Ethylbenzene, is available upon request.
	www.advance-scientific.com /Properties.asp?CODE=L2005 (139 words)

	Chloride Lithium Precipitation Rna (via CobWeb/3.1 planetlab1.tamu.edu) (Site not responding. Last check: 2007-10-08)
		The NF staurosporine (Sigma); lithium chloride (Sigma); indirubin-3 pH 8.0) or radioimmune precipitation assay buffer (1% Nonidet P >>
		Total RNA was isolated according to the protocol of Chomczynski and Sacchi (26), modified by adding a 4 M lithium chloride precipitation.
		Lithium chloride (LiCl) precipitation LiCl precipitation is a selective precipitant of RNA.
	www.dnalabtesting.com.cob-web.org:8888 /rna/chloridelithiumprecipitationrna (1399 words)

	Lithium Diisopropylamide CAS 4111-54-0 Suppliers & Manufacturers, Price
		Lithium Diisopropylamide CAS 4111-54-0 Suppliers and Manufacturers, Price
		Pennsylvania, USA Gelest, Inc. is a supplier of commercial and research quantities of organosilicon, tin & germanium compounds as well as metal alkoxides, metal diketonates and silicones.
		Our carbon steel cylinder helps to store and dispense bulk quantities of hazardous or air sensitive liquids and compressible gases More...
	www.chemicalregister.com /Lithium_Diisopropylamide/Suppliers/pid16840.htm (91 words)

	RXE Forum - Application Literature
		Rate studies of lithium diisopropylamide-mediated ester metalations are described.
		A fractional order dependence on the lithium diisopropylamide concentration, a first order dependence on the THF concentration, and a substantial kinetic isotope effect reveal that the previously characterized disolvated dimers undergo deaggregation to disolvated monomers prior to rate limiting proton transfer.
		Introduction Lithium diisopropylamide (LDA) has been prominent in the development of synthetic organic chemistry as a highly reactive and selective Bronsted base(1).
	www.rxeforum.com /FP18-4_page1.htm (455 words)

	lithium diisopropylamide (Site not responding. Last check: 2007-10-08)
		FMC Lithium is one of the world largest producers of lithium chemicals, creating over 250 specialty inorganic, organic and metal products.
		The leading processor of lithium compounds, metals and derivatives, FMC Lithium Division has operations in the United States, England, Argentina and Japan.
		Organic Syntheses presents to the organic chemistry community detailed experimental methods in a standard format for the synthesis of organic compounds.
	www.neis.com /chemnames/L/lithium_diisopropylamide.html (331 words)

	Lithium Diisopropylamide: Oligomer Structures at Low Ligand Concentrations
		Lithium Diisopropylamide: Oligomer Structures at Low Ligand Concentrations
		N NMR spectroscopic studies of lithium diisopropylamide (LDA) solvated by substoichiometric concentrations of oxetane, THF, Et O, and diisopropylamine are described.
		Possible benefits of carrying out organolithium chemistry at low ligand concentrations are discussed.
	pubs.acs.org /cgi-bin/jtext?jacsat/123/i02/abs/ja003104i (87 words)

	Dr. Bernstein's Publications & Presentations (Site not responding. Last check: 2007-10-08)
		"On the Structure of Lithium Hexamethyldisilazide (LiHMDS) in the Presence of Hexamethylphosphoramide (HMPA).
		"The Structure and Reactivity of Lithium Diisopropylamide in the Presence of N,N,N,'N' Tetramethylethylenediamine (TMEDA)", Max P. Bernstein, Floyd E. Romesberg, David J. Fuller, Aidan T. Harrison, David B. Collum, Qi-Yong Liu, and Paul G. Willard, J.
		"On the Structure and Reactivity of Lithium Diisopropylamide in Hydrocarbon Solutions", Yong-Joo Kim, Max P. Bernstein, Angela S. Galiano Roth, Floyd E. Romesberg, Paul G. Willard, David J. Fuller, Aidan T. Harrison, and David B. Collum, Journal of Organic Chemistry, 56, 4435.
	web99.arc.nasa.gov /~astrochm/maxpubs.html (994 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		Pay particular attention to the regiochemistry and stereochemistry of the reaction.
		LDA (lithium diisopropylamide) is a very strong base and will completely convert a carbonyl compound into the corresponding enolate anion.
		Reaction of this complex with an alkyl halide results in the alkylation of the carbonyl compound at the
	www.chem.uic.edu /web1/OCOL3/CH22/22A/22ACANS.HTM (332 words)

	NASA's Astrochemistry Website
		Bernstein, M. P., and Collum, D. Metalation of Imines by Lithium Diisopropylamide Solvation by N,N,N',N'-Tetramethylethylene diamine: Evidence for Solvent-Free Open Dimer Reactive Intermediates.
		Bernstein, M. P., and Collum, D. Solvent and Substrate-Dependent Rates of Imine Metalations by Lithium Diisopropylamide: Understanding the Mechanisms Underlying Krel.
		Bernstein, M. P., Romesberg, F. E., Fuller, D. J., Harrison, A. T., Collum, D. B., Liu, Q.-Y., and Willard, P. The Structure and Reactivity of Lithium Diisopropylamide in the Presence of N,N,N,'N' Tetramethylethylenediamine (TMEDA).
	www.astrochem.org /maxpubs.htm (655 words)

	Aldol Addition
		by employing a sterically hindered lithium amide base such as LDA (lithium diisopropylamide).
		With an unsymmetrically substituted ketone, such a non-nucleophilic, sterically-demanding, strong base will abstract a proton from the least hindered side.
		Proton transfer is avoided with lithium enolates at low temperatures in ethereal solvents, so that addition of a second carbonyl partner (ketone or aldehyde) will produce the desired aldol product.
	www.organic-chemistry.org /namedreactions/aldol-addition.shtm (287 words)

	Organic Pathway (Site not responding. Last check: 2007-10-08)
		For the question below is the difference Because when the base (LDA) concentration isn't high enough it attacks the carbon of highest degree.
		When 2-methylcyclohexanone is treated with 1.2 equivalents of lithium diisopropylamide
		methylcyclohexanone is treated with 0.5 equivalents of lithium diisopropylamide followed by
	www.chemicalforums.com /index.php?topic=6803.msg30908 (563 words)

	Chemetall Lithium Division - The Lithium Company - The Lithium Supplier (via CobWeb/3.1 planetlab1.tamu.edu) (Site not responding. Last check: 2007-10-08)
		Chemetall Lithium Division - The Lithium Company - The Lithium Supplier (via CobWeb/3.1 planetlab1.tamu.edu)
		If you do not see the product you are looking for please contact your local Chemetall company.
		Lithium Aluminum Hydride, 4 % Solution in THF
	www.chemetalllithium.com.cob-web.org:8888 /basic.jsp?xml=datasheet.jsp&newsDat=specialities&subcat=Amides (102 words)

	Stanford University \| Chemistry Department \| Events \| Conferences and Lectures \| William S. Johnson Symposium
		He is the Associate Editor of the Journal of Organic Chemistry and has served as an Assistant Coach in two Division I collegiate sports.
		"Lithium Diisopropylamide: Lessons Learned from Solution Kinetics and Implications for Organic Synthesis"
		If you have questions or need additional information please conteact Patricia Dwyer at 650-723-4770
	www.stanford.edu /dept/chemistry/events/conf/wsjohnson/Collum.html (287 words)

	Chemistry Organic Chemistry Homework Help
		Please see attachment for questions A to E. Please explain in detail (11 Credits Bid).
		What is the absolute stereochemistry of the asymmetric carbon in compound O? When compound O is treated with lithium diisopropyl amide, followed by allyl bromide, compound P is produced as a single stereoisomer.
		I attempted some of this but I am clueless as to some of the other stuff.
	www.brainmass.com /homeworkhelp/chemistry/organicchemistry/pg17 (289 words)

	Graduate School at Cornell (Site not responding. Last check: 2007-10-08)
		The odd thing is that as a ligand TMEDA sucks; It can't even compete with garden variety etherial solvents like THF.
		"Polydentate Amine and Ether Solvates of of Lithium Hexamethyldisilazide (LiHMDS): Relationship of Ligand Structure, Relative Solvation Energy, and Aggregation State.", Brett L Lucht, Max P. Bernstein, Julius F. Remenar, and Dr.
		Do you have any questions about this web site?
	web99.arc.nasa.gov /~astrochm/tmeda.html (272 words)

Try your search on: Qwika (all wikis)