Search
Skip to Search Results- 1Antwi Peprah, Benjamin
- 1Beckers, Nicole
- 1Bunquin, Jeffrey
- 1Chakrabarti, D.
- 1Corkum, Elizabeth G
- 1D. E. Sparks
-
Fall 2011
In the Introduction of this thesis, consideration is given to historical and ongoing value of investing research efforts in the total synthesis of natural products. Following this discussion is an explanation of the factors that guided the selection of palmerolide A as a synthetic target. The...
-
Fall 2011
Large polycyclic aromatic nitrogen containing asphaltene model compounds, with molecular weights from 535 to 702 g/mol, were catalytically hydrogenated and hydrodenitrogenated in the presence of a commercial NiMo/γAl2O3 catalyst in a stainless steel batch reactor at 370 °C and 17.9 MPa total...
-
Fall 2011
Propargylic alcohol natural products are found in many species of terrestrial plants and marine organisms. Because these compounds are usually isolated from the natural source in only small amounts, few studies of propargylic alcohol natural products have been conducted to date. Nevertheless,...
-
Synthesis and screening of heterogeneous multimetallic nanoparticle catalysts for mono-, poly- and heteroaromatic hydrogenation activity under mild conditions
DownloadFall 2011
Nanoparticle catalysts have shown to be advantageous over traditional catalysts for many reasons and active for a wide variety of reactions. This thesis describes an approach for the synthesis and screening of heterogeneous multimetallic nanoparticle catalysts for aromatic hydrogenation activity...
-
Spring 2011
The Noyori-type catalyst trans-Ru((R)-BINAP)(H)2((R,R)-dpen) (6) and its analogues are among the most active and enantioselective ketone hydrogenation systems reported to date. Its applications towards other types of carbonyl compounds are, however, understudied. This dissertation describes the...
-
Characterization of asphaltene molecular structures by cracking under hydrogenation conditions and prediction of the viscosity reduction from visbreaking of heavy oils
DownloadSpring 2013
The chemical building blocks that comprise petroleum asphaltenes were determined by cracking samples under conditions that minimized alterations to aromatic and cycloalkyl groups. Hydrogenation conditions that used tetralin as hydrogen-donor solvent, with an iron-based catalyst, allowed...
-
Empowering the Base Metals: Rational Design of Homogeneous Catalysts for Hydrotreatment, and Reduction of Organic Unsaturates
DownloadFall 2013
Hydrocarbon-soluble, low-coordinate, phosphoranimide-supported complexes of the base metals (iron, cobalt and nickel) were developed and evaluated for a range of stoichiometric and catalytic bond-forming and bond-breaking transformations. An unprecedented family of tetrametallic clusters of Co(I)...
-
The Synthesis of Rhodium Catalyst-Organic Frameworks for Isomerization and Continuous-Flow Hydrogenation Reactions
DownloadFall 2013
The development of immobilized asymmetric catalysts is of vital importance as it would allow for easy catalyst recovery from the reaction mixture and reuse. One strategy for immobilization involves the synthesis of insoluble polymer-supported catalysts. Most polymeric catalysts are made by...
-
Design, Development and Mechanistic Study of Ruthenium-Based Catalysts for the Hydrogenation of Imides and Amides
DownloadSpring 2014
Prior mechanistic studies demonstrate that trans-[RuH2((R)-BINAP)((R,R)-dpen)] is a remarkably active carbonyl reducing agent at low-temperatures in THF-d8. This dissertation describes the monohydrogenation of cyclic meso-imides using this catalyst and related complexes under mild conditions....