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Showing 1 to 20 of 53 for “"organolithium"”.
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Structural Studies of Organolithium Compounds
Made available in DSpace on 2014-12-09T17:35:33Z (GMT). No. of bitstreams: 1 6612345.pdf: 2529855 bytes, checksum: af2a6f32ca27ee41dbf3bfe2d30e7e75 (MD5) Previous issue date: 1966
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Bonding and Stereochemical Studies of Unsaturated Organolithium Compounds
Made available in DSpace on 2014-12-10T23:01:15Z (GMT). No. of bitstreams: 1 7212102.pdf: 4304647 bytes, checksum: a7542a08b78334c4eceecd5ce07f8796 (MD5) Previous issue date: 1971
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The reaction of organolithium reagents with carbon monoxide.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemistry, 1969
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The Electrophilic Amination of Organolithium Compounds With Methyllithium-Methoxylamines
Strongly basic aliphatic and benzenoid aromatic organolithium compounds can be stoichiometrically converted to primary amines, upon treatment with two equivalents of a methoxylamine-methyllithium complex, in 14-97% yields, or to secondary amines, either inter- or intramolecularly, upon treatment …
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Structural, Bonding, and Reactivity Studies of Unsaturated Organolithium Compounds
Made available in DSpace on 2014-12-10T23:02:12Z (GMT). No. of bitstreams: 1 7511599.pdf: 6397672 bytes, checksum: 4f6a1a7b24ae0f91d630dc6fcad030c2 (MD5) Previous issue date: 1974
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Condensations of Organolithium and Organomagnesium Reagents With Duryl Ketones
Made available in DSpace on 2014-12-05T19:37:47Z (GMT). No. of bitstreams: 1 6104345.pdf: 3038861 bytes, checksum: ebc4e31333ea7e7382cef973b4cc13a3 (MD5) Previous issue date: 1961
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Rules for ring closure and aspects of organolithium chemistry
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemistry, 1980
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Asymmetric Syntheses With (-)-Sparteine-Complexed Benzylic and Allylic Organolithium Reagents
… of racemic cyclic unsaturated esters with the organolithium intermediates derived from lithiation of N-Boc- N-(p-methoxyphenyl)cinnamylamine with n -BuLi/(-)-sparteine was investigated. Kinetic resolution in conjugate addition reactions with alpha,beta-unsaturated lactones proceed with …
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Mass Spectral and Nuclear Magnetic Resonance Studies of Organolithium Compounds
Made available in DSpace on 2014-12-09T17:36:37Z (GMT). No. of bitstreams: 1 7013377.pdf: 2724780 bytes, checksum: f4b91d4d1ec5c43c62a615920fa0ac81 (MD5) Previous issue date: 1969
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Computational Studies of Protonated Cyclic Ethers and Benzylic Organolithium Compounds
Protonated epoxides feature prominently in organic chemistry as reactive intermediates. Gas-phase calculations studying the structure and ring-opening energetics of protonated ethylene oxide, propylene oxide and 2-methyl-1,2-epoxypropane were performed at the B3LYP and MP2 levels (both with the …
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Kinetics and Mechanism of Organolithium and Organomagnesium Reagent Reactions With Ketones
Made available in DSpace on 2014-12-10T23:01:29Z (GMT). No. of bitstreams: 1 7317148.pdf: 6299095 bytes, checksum: 77321523282a5ad7528384f2d11a3a67 (MD5) Previous issue date: 1972
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Mechanistic studies of asymmetric induction at benzylic centers of organolithium species
The mechanisms of asymmetric induction involving the lithiation and substitution of N-benzyl-N-Boc-N-p-methodically amine and N-benzyl-N-Boc-N-3-chloropropyl amine were investigated and are reported here. These two substrates undergo deprotonation with butyllithium in the presence of the chiral …
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I. Enthalpy of Protonation Studies on Selected Organolithium Compounds. Ii. Dipole Stabilized Carbanions in N-Methyl Carboxamides
Made available in DSpace on 2014-12-13T20:10:04Z (GMT). No. of bitstreams: 1 7714930.pdf: 5080318 bytes, checksum: cf7b65bfc5e248c32aa17b9119ac4f66 (MD5) Previous issue date: 1977
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Complex-induced proximity effects in proton transfer and halogen-metal exchange reactions
… or in a transient high local concentration of organolithium reagent as the organolithium is added to the amide substrate. Differentiation between these two possibilities is achieved by employing reverse addition of the amide substrate to a solution of the organolithium reagent. In cases where …
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(--)-Sparteine Mediated Asymmetric Synthesis Through Conjugate Addition of Allylic and Benzylic Organolithium Species: Development of a Methodology and Its Application Toward a Total Synthesis
… In addition, conjugate addition of the allylic organolithium species with N-protected 4-pyridones provides high yields of the corresponding 1,4-addition adduct with high enantiomeric ratios (ers). The reaction is believed to proceed through an N-acyl pyridinium salt formed on reaction of …
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1. The Endocyclic Restriction Test: Oxygen Transfer From N-Sulfonyl Oxaziridines to Alkenes and Fluorine From N-Fluorosultams to Carbanions. 2. Intra- and Intermolecular Kinetic Isotope Effects in Directed Lithiations
… transfer from a benzylic or aryl carbon atom to organolithium reagents has been investigated by measuring intra- and intermolecular kinetic isotope effects. The results were more in line with a two-step mechanism where an organolithium base coordinates to the heteroatom of the directing group …
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Enantioselective lateral lithiation-substitution reactions using benzamide directing groups
Reactions involving organolithium reagents under the influence of the chiral ligand to affect the enantioselective replacement of a carbon-proton bond with a carbon-carbon bond or a carbon-heteroatom bond are described.
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Enantioselective lateral lithiation-substitution of o-ethyl- and o-benzyl-N-pivaloylanilines: Studies of a pathway of stereoinformation transfer
… intermediate. Electrophilic substitution of the organolithium in the presence of ($-$)-sparteine provides the products with enantiomeric excesses close to 80% for reactions with most electrophiles. The absolute configuration at the benzylic carbon is the same regardless of whether stannyl or …
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FROM BATCH TO FLOW: RETHINK THE WAY OF DOING CHEMISTRY
… and three chapters on the research projects, organolithium chemistry, photochemistry, alkyl nitrite in α-keto nitrosation reaction. The last section of every chapter is dedicated to the discussion of the result where on water organolithium addition to imines, Pd mediated cross coupling …
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