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Showing 1 to 18 of 18 for “"Organolithium compounds."”.
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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 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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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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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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ΧΡΗΣΕΙΣ ΤΩΝ ΣΟΥΛΦΙΔΙΩΝ ΣΤΗΝ ΟΡΓΑΝΙΚΗ ΣΥΝΘΕΣΗ. 1) ΜΕΘΟΔΟΛΟΓΙΑ ΣΧΗΜΑΤΙΣΜΟΥ ΑΛΛΥΛΙΚΩΝ ΚΑΡΒΑΝΙΟΝΤΩΝ ΜΕΡΙΚΩΣ ΕΝΣΩΜΑΤΩΜΕΝΩΝ ΣΕ ΙΣΟΚΥΚΛΙΚΟΥΣ ΔΑΚΤΥΛΙΟΥΣ 2) ΕΠΙΜΗΚΥΝΣΗ ΑΛΚΥΛΟΜΑΔΟΣ ΟΡΓΑΝΟΛΙΘΙΚΩΝ ΕΝΩΣΕΩΝ
… NEW METHOD FOR THE ALIPHATIC CHAIN ELONGATION OF ORGANOLITHIUM COMPOUNDS WAS DEVELOPED. THE STARTING MATERIALS WERE PHS-SUBSTITUTED ALKYLHALIDES. THE ELONGATION WAS SUCCEEDED VIA "HETEROCUPRATES".
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[4 + 1] annulation reactions of (trialkylsilyl)ketenes : synthesis of substituted indanones and cyclopentenones
… the synthesis of carbocyclic and heterocyclic compounds. A new [4 + 1] annulation strategy for the synthesis of substituted 2-indanones, based on the reaction of TAS-arylketenes with trimethylsilyl diazomethane, has been developed. In addition, a new class of carbenoid reagents for our …
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Dynamics and Catalytic Resolution of Selected Chiral Organolithiums
… of new methods to dynamically resolve racemic organolithiums using stoichiometric amounts of the chiral ligand. When this concept is implemented successfully, it obviates the need for covalently attached chiral auxiliary based methods, asymmetric deprotonation, and asymmetric synthesis of a …
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Study of Synthesis, Reactions and Enantiomerization of C<sub>α</sub>-Chiral Grignard Reagents
… The most studied in this class are the chiral organolithium reagents with many reported examples. The primary focus of our research is the development of C<sub>α</sub>-chiral Grignard reagents, where the metal bearing α-carbon is the sole source of chirality. Examples of such Grignard reagents …
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Group 11 'Ate Bases: Towards an Understanding of Solid- and Solution-State Structures
… chemo- and regioselectively metalate aromatic compounds, via directed ortho cupration (DoCu). This thesis begins with an introduction to aspects of the chemistry of organolithium compounds, group 11 organometallic compounds and their lithium 'ate complexes. Examples of such synergic bases are …
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NMR Study of n-Propyllithium Aggregates
A variable temperature 1H, 13C, and 6Li NMR study of n-propyl-6Li-lithium showed five different aggregates, similar to that in the literature as (RLi)n, n= 6, 8, 9, 9, 9. There were also a number of additional new species, identified as lithium hydride containing aggregates. Unexpectedly, a series …
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An NMR Study of Trimethylsilylmethyllithium Aggregates and Mixed Trimethylsilylmethyllithium/Lithium trimethylsilylmethoxide Aggregates
… gave inconclusive results whether or not these compounds formed, which is different from other primary alkyllithium compounds studied in the past. A study of neopentyllithium, NpLi, indicates only one aggregate in solution with the aggregation state unknown using low temperature 13C NMR …
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An NMR Study of 2-Ethylbutyllithium/Lithium 2-Ethyl-1-butoxide Mixed Aggregates, Lithium Hydride/Lithium 2-Ethyl-1-butoxide Mixed Aggregates, n-Pentyllithium Aggregates, and n-Pentyllithium/Lithium n-Pentoxide Mixed Aggregates
A 13C and 6Li variable temperature NMR study of 2-ethylbutyllithium/lithium 2-ethyl-1-butoxide mixed aggregates formed from reacting 2-ethyl-1-butanol with 2-ethylbutyllithium in two O/Li ratios of 0.2/1 and 0.8/1. The 0.2/1 sample resulted in two 2-ethylbutyllithium/lithium 2-ethyl-1-butoxide …
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An NMR study of 2-ethyl-1-butyllithium and of 2-ethyl-1-butyllithium/lithium 2-ethyl-1-butoxide mixed aggregates
A 1H, 13C, and 6Li NMR study of 2-ethyl-1-butyllithium indicated that 2-ethyl-1-butyllithium exists only as a hexameric aggregate over the entire temperature range of 25 to - 92.1 ° C in cyclopentane. Reacting 2-ethyl-1-butyllithium with 2-ethyl-1-butanol resulted in alkyllithium/lithium alkoxide …
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NMR study of 2-ethylhexyllithium aggregate and 2- ethylhexyllithium/lithium 2-ethyl-1-hexoxide mixed aggregates.
A 1H, 13C, and 6Li NMR study of 2-ethylhexyllithium showed that 2- ethylhexyllithium exists solely as a hexamer in cyclopentane solution over the temperature range from 25 to -65 °C. Furthermore, 2-ethylhexyllithium and lithium 2- ethyl-1-hexoxide were shown to form mixed aggregates when the …