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Gold-catalyzed generation of vinylthionium ions and the development of an organocatalytic, asymmetric (4+3)-cycloaddition reaction
(University of Missouri--Columbia, 2017)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] An allylic benzoate ester was prepared and used as a progenitor of vinylthionium ions for (4+3)-cycloaddition reactions. The chemistry was limited to ...
[2,3]-Sigmatropic rearrangement of propargylic sulfinates ; Regiodivergent synthesis of 1- and 2 arylsulfonyl 1,3-dienes, and III. Synthesis of Troger's base-derived ligands
(University of Missouri--Columbia, 2014)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] The [2,3]-sigmatropic rearrangement of propargylic sulfinates to allenic sulfones was studied under both silver and copper catalysis. Metal salts having ...
1,5-hydride shift of alkenyl sulfoximine/[4+3] cycloaddition and ring opening/novel hydrazine synthesis from Tröger's base analogues
(University of Missouri--Columbia, 2012)
Three synthetic methodologies are studied in details in this dissertation. For 1,5-hydride shift of alkenyl sulfoximine methodology, the reaction mechanism was studied using deuterium labeling. An uncommon 6-endo-trig ...
Studies toward the carbanion-accelerated 6[Pi] electrocyclization : polyfunctional boronates
(University of Missouri--Columbia, 2014)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] The 6π electrocyclization remains an important class of pericyclic reactions which provides access to substituted six-membered rings from uncyclized ...
2,1-Benzothiazines : preparation and reactivity
(University of Missouri--Columbia, 2010)
The synthesis of chiral ligands to tune the reactivity and stereoselectivity of many catalytic asymmetric reactions has been given considerable attention in synthetic organic chemistry over the past decade. This report ...
Synthesis of fluorescent 7-amino-2,1-benzothiazines and total synthesis of buddledone A
(University of Missouri--Columbia, 2011)
The development of new fluorescent compounds has been reported continuously due to their application as sensors and optical devices for material, biological and chemical applications. This dissertation reports the syntheses ...
Formal total synthesis of pseudopteroxale : progress toward total synthesis of hamigeran B
(University of Missouri--Columbia, 2011)
In the first chapter, a formal total synthesis of pseudopteroxazole is presented, highlightening an E-selective Horner-Emmons reaction, a Buchwald-Hartwig coupling, and a diastereoselective intramolecular Michael addition. ...
Studies of the chemistry of sulfoximines, 2, 1 benzothiazines and cyclopentadienones
(University of Missouri--Columbia, 2011)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] The N-Acylation of a sulfoximine with carboxylic acids was accomplished with boric acid and several boronic acids. Aliphatic acids give fair yields ...