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Showing 1 to 20 of 27 for “"Carbanions."”.

  1. Synthetic Applications of Sulfur-Stabilized Carbanions

    Ollinger, JanetUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-10T23:01:58Z (GMT). No. of bitstreams: 1 7500390.pdf: 4804161 bytes, checksum: 6e66db7a5521603a760c0c253b2a4958 (MD5) Previous issue date: 1974

    uiuc Repository record

  2. Synthetic and Mechanistic Investigation of Alpha-Amido Carbanions

    Zajdel, William JohnUniversity of Illinois at Urbana-Champaign2014

    The removal of an sp('3) proton from a carbon adjacent to nitrogen followed by reaction with an electrophile to effect substitution at that site provides umpolung of the customary amine polarity. This thesis reports the use of a carbonyl moiety to aid in the stabilization of negative charge …

    uiuc Repository record

  3. Synthetically Useful Dipole-Stabilized Carbanions From Thioesters and Thiocarbamates

    Becker, Peter DonaldUniversity of Illinois at Urbana-Champaign2014

    … of the formation of dipole-stabilized carbanions from thioesters, deprotonation of a tertiary center at the carbon adjacent to the sulfur of a thioester was found for the first time. Isopropyl, 2-octyl, and 4-tert-butylcyclohexyl 2,4,6-triisopropylthiobenzoates react with …

    uiuc Repository record

  4. Stereoselective synthesis : studies involving dipole-stabilized carbanions alpha to nitrogen

    Nelson, Kenneth M.University of Saskatchewan2004

    … A review of the application of dipole-stabilized carbanions a to nitrogen used in the stereoselective synthesis of natural products is presented. The second chapter in this thesis describes a study of the use of N-Boc-3-pyrroline, and related compounds, as molecular scaffolds for the …

    sask Repository record

  5. Dipole - Stabilized Carbanions From a Methylamide and a Methyl Thioester

    Farney, Robert FrancisUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-10T23:02:03Z (GMT). No. of bitstreams: 1 7511572.pdf: 4835541 bytes, checksum: a8b2da654fbeed093665fa20b6b7c27a (MD5) Previous issue date: 1974

    uiuc Repository record

  6. Chiral phosphonyl and thiophosphonyl carbanions in asymmetric alkylation and olefination reactions

    Chen, Chien-TienUniversity of Illinois at Urbana-Champaign2011

    A series of 3-substituted 2-benzyl-6-methyl-1,3,2-oxazaphosphorinane-2-oxides, derived from (S)-N-alkyl-4-amino-2-butanols, was prepared. The alkylation behavior of the derived lithium anions was examined as a function of the N-substituents and electrophiles. In the l-series, the methylation …

    uiuc Repository record

  7. Studies on the use of alpha-silyl substituted carbanions in organic synthesis

    Soobramanien, Marie-Claire ChantalThe Open University1989

    The stereochemical outcome of the Peterson olefination reaction was studied using o(-trimethylsilylbenzyl carbanion and a series of N-aliphatic/aromatic azomethines. All reactions led stereoselectively to trans-olefins in moderate to low yields. The Peterson intermediate was isolated when …

    the-open-u Repository record

  8. The ¹³C NMR spectra of conjugated carbanions and preparation and thermal behavior of 3-vinylcyclooctadienyl anion

    Davidson, Ellwood Ward, 1942-The University of Arizona.1972

    arizona-thes Repository record

  9. I. Enthalpy of Protonation Studies on Selected Organolithium Compounds. Ii. Dipole Stabilized Carbanions in N-Methyl Carboxamides

    Brubaker, Gaylen RayUniversity of Illinois at Urbana-Champaign2014

    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

    uiuc Repository record

  10. The development and application of metal-catalyzed processes for organic synthesis

    Hennessy, Edward J. (Edward John), 1977-Massachusetts Institute of Technology2005

    … 1. Copper-Catalyzed Arylation of Stabilized Carbanions A mild, general catalytic system for the synthesis of [alpha]-aryl malonates has been developed. Aryl iodides bearing a variety of functional groups can be effectively coupled to diethyl malonate in high yields using inexpensive and …

    mit Repository record

  11. Studies on the Stereochemistry and Mechanism of Taxadiene Biosynthesis

    Jin, QingwuUniversity of Illinois at Urbana-Champaign2015

    … geranylgeraniol were prepared by alkylation of carbanions generated from allylic ethers.

    uiuc Repository record

  12. 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

    Anderson, David R.University of Illinois at Urbana-Champaign2015

    … and fluorine transfer from N-fluoro sultams to carbanions was investigated. In the former application of the endocyclic restriction test, a transition state model was developed, however, a model has not been constructed in the latter case. Although no transition state model has been constructed …

    uiuc Repository record

  13. A study of some carbanions derived from organic halogen compounds. Part I, The reaction of b̲e̲t̲a̲-haloethyl bromides with sodium hydroxide; Part II, The base catalysed dehydrohalogenation of b̲e̲t̲a̲-benzene hexachloride

    Langford, Paul BrooksGeorgia Institute of Technology1962

    gatech Repository record

  14. ΧΡΗΣΕΙΣ ΤΩΝ ΣΟΥΛΦΙΔΙΩΝ ΣΤΗΝ ΟΡΓΑΝΙΚΗ ΣΥΝΘΕΣΗ. 1) ΜΕΘΟΔΟΛΟΓΙΑ ΣΧΗΜΑΤΙΣΜΟΥ ΑΛΛΥΛΙΚΩΝ ΚΑΡΒΑΝΙΟΝΤΩΝ ΜΕΡΙΚΩΣ ΕΝΣΩΜΑΤΩΜΕΝΩΝ ΣΕ ΙΣΟΚΥΚΛΙΚΟΥΣ ΔΑΚΤΥΛΙΟΥΣ 2) ΕΠΙΜΗΚΥΝΣΗ ΑΛΚΥΛΟΜΑΔΟΣ ΟΡΓΑΝΟΛΙΘΙΚΩΝ ΕΝΩΣΕΩΝ

    Σμόνου, ΙουλίαNational and Kapodistrian University of Athens1987

    … PART A NEW METHOD FOR THE FORMATION OF ALLYLIC CARBANIONS WAS DEVELOPED, TWO CARBONS OF WHICH TAKE PART IN ISOCYCLIC RINGS. METHYL-PHENYL SULFIDE WAS USED FOR THIS PURPOSE. COUPLING OF THE LITHIATED SULFIDE WITH A NUMBER OF ALIPHATIC CYCLOKETONES LED TO CARBINOLS, WHICH WERE SELECTIVELY …

    greece Repository record

  15. Studies of intramolecular S<sub>RN</sub>1 reactions of carbanions derived from 2-(o-halobenzyl)amides and 3-(o-halobenzyl)imides: application to the synthesis of succinimido[3,4-b]indane, a potential anticonvulsant

    Dandekar, Sushama A.Virginia Tech1992

    The possibility of inducing intramolecular SRN! reactions in two 2-(o-halobenzyl)- amides, 2-(o-iodobenzyl)-N,N,N’N’-tetramethylsuccinamide (77) and 2-(o-iodobenzyl)- N,N,N’N’-tetramethylglutaramide (80), and three 3-(o-halobenzyl)imides, 3-(oiodobenzyl)succinimide (99), …

    vt Repository record

  16. I. SYNTHETIC APPLICATIONS OF CARBANIONS DERIVED FROM GLYCOLATES--STUDIES DIRECTED TOWARD THE SYNTHESIS OF VITAMIN-C; II. CRYSTAL AND MOLECULAR STRUCTURE OF SYN-9-HYDROXY-1-AZA-4-OXATRICYCLO (3.2.1.1(3,8)) - NONANE--A BRIDGED PYRROLIZIDINE

    Deardorff, Donald RossThe University of Arizona.1979

    arizona-thes Repository record

  17. Development of Main Group Systems for Small Molecules Activation

    Xu, Maotong2021

    … acidic alkali metal cations with hydride (H-), carbanions (R3C-), amides (R2N-) or phosphides (R2P-) are shown to activate H2 reversibly and hydrogenate unsaturated molecules. In addition, the reaction of alkali metal species with CO affords the transient anionic carbene intermediate, which can …

    toronto-retro Repository record

  18. A study of various nucleophiles in aromatic SRN1 reactions

    Wong, Jim-wahVirginia Polytechnic Institute and State University1981

    … Upon 5-25 min of near-UV irradiation, the carbanions of 2-benzyl-4,4-dimethyl-2-oxazoline, ethyl phenylacetate, t-butyl acetate, N,N-dimethylacetamide and dimethyl methylphosphonate underwent reactions with both 2-bromopyridine and iodobenzene in an S<sub>R</sub><sub>N</sub>1 manner to give …

    vt Repository record

  19. A new cyclohexyl-based chiral auxiliary: application in the total synthesis of (+)-linalool oxide

    Al-Hazmi, AliUniversity of Southampton2010

    … nucleophilic opening of cyclohexene oxide using carbanions. The racemic cyclohexyl-based chiral auxiliaries were coupled with the 6-methyl-2- methylenehept-5-enoyl chloride (2.20) to form the dienes esters 2.38-2.44. The chiral auxiliarydiene ester adducts 2.38-2.44 were subjected to a …

    soton Repository record

  20. The Electrophilic Amination of Organolithium Compounds With Methyllithium-Methoxylamines

    Kokko, Bruce JeromeUniversity of Illinois at Urbana-Champaign2014

    … result suggests that electrophilic amination of carbanions with methoxylamine appears to occur via a concerted displacement mechanism, and sets a precedent for the use of a double labelling experiment in mechanistic studies of other systems where traditional probes cannot be used. The amination …

    uiuc Repository record

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