Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 93 for “"Imines"”.
-
Isomerism of Substituted Imines
Made available in DSpace on 2014-12-05T19:37:35Z (GMT). No. of bitstreams: 1 6100140.pdf: 7304946 bytes, checksum: ff93b7b01afd7ca1088bb64f3289a7cb (MD5) Previous issue date: 1960
-
Palladium-catalyzed PMHS reductions of imines
We explored the Pd-catalyzed reductions of imines using polymethylhydrosiloxane (PMHS) in the presence of aqueous KF. This methodology developed by our group facilitates the reduction of nitrogen-containing functional groups under mild conditions and short reactions times. To the best of our …
-
Scope of enantioselective reduction of imines with trichlorosilane
… of enantioselective organocatalytic reduction of imines with trichlorosilane. Syntheses of various precursors (ketones) and substrates (imines) for the reduction reaction and their reduction following the protocol (Scheme A1) are described in this thesis. 1. Aromatic heterocycles containing …
-
N-Phosphino-pyridyl Imines: Flexible, Multi-functional Reagents
… studies of a range of N-phosphino-pyridyl imines with the general structure (C5H5N)(Ar)C=NPR2 (1) {R = alkyl or aryl and Ar = aryl} are reported in chapter II. The molecular structures of their palladium dichloride complexes are presented, highlighting the effect of differing substituents …
-
Folding-Driven, Nucleation -Elongation Polymerization of Phenylene Ethynylene Imines
… polymerization of oligo(m-phenylene ethynylene) imines in solution should inherently show nucleation-elongation in chain growth. The evidence for this behavior was obtained from polymerizations conducted under conditions of imbalanced stoichiometry. Since the polymerization proceeds via …
-
The development of novel hetrogeneous catalysts for the hydrogenation of prochiral imines
… the enantioselective hydrogenation of prochiral imines. Work has centred on the support of homogeneous catalysts, with the intention of establishing a heterogeneous catalyst without loss of activity. Initially, established heterogeneous systems were investigated. As the methyl pyruvate system of …
-
Development and Mechanistic Investigation of Indium(III)-Catalysed Hydrosilane Reduction of Imines
… as catalysts for the hydrosilane reduction of imines. The functionalised BINOL ligands employed include a range of C1-symmetric BINOL ligands, which were synthesised as part of a project on optimising BINOL phosphoric acid ligands described in Chapter 2. Significant progress has been made …
-
Synthesis, study and application of silyl ketene imines in Lewis base catalyzed carbonyl addition
… carbons a range of disubstituted N-silyl ketene imines has been investigated as latent nucleophiles for additions to carbonyl compounds. In the presence of silicon tetrachloride and a catalytic amount of chiral bis-phosphoramide, N-silyl ketene imines underwent extremely rapid additions to …
-
Asymmetric nickel-catalyzed three-component assembly of allylic amines from alkynes, imines and organoboron reagents
… amines are assembled in one step from alkynes, imines, and organoboron reagents (boronic acids or boranes) using a catalyst derived from Ni(cod)2 and (c-CsH9)3P or (o-anisyl)3P. This catalytic, three-component process is tolerant of ketones, esters, and free hydroxyl groups; a degree of …
-
Hydroamination of terminal allylic imines, allylic amines, and internal and terminal homoallylic amines: Regioselective and regiodivergent transformations
C–N bonds are ubiquitous in organic chemistry. Mild methods that allow for the direct formation of this motif from readily accessible functional groups would represent a powerful advance in organic synthesis. The intermolecular hydroamination of alkenes and amines represents a novel approach …
-
DEVELOPMENT OF METAL-CATALYZED REACTIONS OF ALLENES WITH IMINES AND THE INVESTIGATION OF BRΘNSTED ACID CATALYZED ENE REACTIONS
… study the reaction chemistry between allenes and imines, and (2) to discover new catalysis and novel substrates for the ene reaction. Reactions between allenes and imines have been mostly unexplored despite their ability to generate useful synthetic intermediates. Described herein is the initial …
-
[3+2]-Cycloadditions of Azomethine Imines and Ynolates and Progress Towards a Radical Three-Component Cross-Coupling Reaction
… a novel [3+2]-cycloaddition of azomethine imines and ynolates to construct bicyclic pyrazolidinones in high yields and diastereoselectivities. This methodology is the first example in which the azomethine imine acts as a chiral auxiliary to control the cycloaddition. Optically active …
-
Intermolecular [3+2] Cycloadditions of Imino-isocyanates to Access β-Amino Carbonyl Compounds
… reaction provides complex N,N’-cyclic azomethine imines, and enables access to β-aminocarbonyl compounds from alkenes. β-Amino amides and esters, pyrazolidinones, and pyrazolones were accessed by reductive derivatization of the aminocarbonylation products. Exploration into the limits of this …
-
ΣΥΝΘΕΣΗ ΚΑΙ ΜΕΛΕΤΗ 0-ΚΙΝΟΝΙΜΙΝΟ-, 0-ΚΙΝΟΝΟ-ΜΕΘΙΔΟ- ΚΑΙ Ο-ΚΙΝΟΝΙΜΙΝΟ- ΜΕΘΙΔΟ- ΠΑΡΑΓΩΓΩΝ ΤΗΣ 9, 10-ΦΑΙΝΑΝΘΡΕΝΟΚΙΝΟΝΗΣ ΚΑΙ ΤΗΣ 1, 2-ΑΚΕΝΑΦΘΕΝΟΚΙΝΟΝΗΣ
… AND SEMISTABLE YLIDES AND O-QUINONE-METHIDE IMINES ARE ISOLATED. SOME OF THEM ARE THERMALLY CYCLIZED TO CONDENSED HETERCYCLIC COMPOUNDS . 10-METHOXY-IMINE-9-PHENANTHRENONE REACTS WITH DIENOPHILES TO GIVE DIELS-ALDER PRODUCTS AND ALSO CONDENSED PYRIDINE DERIVATIVES . REACTIONS OF …
Page 1 of 5