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Synthetic studies on marine natural products : Part 1. Synthesis of the sesquiterpenoid dihydropallescensin D via manganese(III)- mediated carbocyclization. Part 2. Approaches toward the synthesis of prianosin and discorhabdin alkaloids

Creator:: Yager, Kraig M.
Resource Type:: Dissertation
Full Text:: M. Yager for the degree of Doctor of Philosophy in Chem istry presented on March 16. 1993. Title

Asymmetric synthesis of cyclopropanes via a "zipper reaction"

Creator:: Lincoln, Christopher M.
Abstract:: The rearrangement of a homoallyl cation to a cyclopropylcarbinyl cation is thought to play a role in the biogenesis of a variety of cyclopropane-containing natural products,¹ a hypothesis which has previously led to the design of successful biomimetic syntheses of several natural products.² The strategy underlying this approach to cyclopropane...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Christopher M. Lincoln for

Design, characterization, and application of spectrometers for determination of low-level dissolved oxygen with small-volume sampling methodology

Creator:: Cakin, Defne
Abstract:: New analytical methods and instrumentation were developed for the determination of dissolved oxygen (DO) at low concentrations in water. The methods were based on monitoring the absorbance increase due to the oxidation of reduced indigo carmine (IC) by oxygen in the sample in different types of spectrometer cells. Spectrophotometer cells...
Resource Type:: Dissertation
Full Text:: : ___________________________________________ James D. Ingle, Jr. New analytical methods and instrumentation were developed for the

Part I: Synthesis and evaluation of synosutine as an inhibitor of serotonin, norepinephrine, and dopamine transporters Part II: Asymmetric approach to the tetracyclic core of neomangicol A

Creator:: Juniku, Rajan B.
Abstract:: Part I: Racemic and asymmetric syntheses of a new substance with prospective antidepressant properties were achieved. In vitro assays with synthetic racemates (±)-25 and (±)-26 suggested that the former is a relatively selective inhibitor of serotonin transporter whereas the latter is a more balanced inhibitor of both serotonin and norepinephrine...
Resource Type:: Dissertation
Full Text:: Abstract approved: _____________________________________________________ James D. White Part I

Studies toward the synthesis of halichlorine and pinnaic acid

Creator:: Korf, Eric A.
Abstract:: Three approaches toward the core of halichlorine and pinnaic acid are described. The first approach entails a racemic transannular nitrone-olefin [3+2] cycloaddition from nitrone 238. Construction of the nitrone 238 began with aldehyde 241. Another key feature in this route involved a ring-closing metathesis for the formation of a 14-membered...
Resource Type:: Dissertation
Full Text:: approved: James D. White Three approaches toward the core of halichlorine and

Studies towards the total syntheses of (+)-phomactins A, D and G

Creator:: Schwartz, Keith D.
Abstract:: Studies towards the total synthesis of (+)-Phomactin A (1), D (6), and G (9), fungal metabolites with unique molecular architecture and pronounced biological activity, are described. These studies resulted in the synthesis of advanced intermediates 354 and 356, which contain all of the carbon atoms of 1, 6 and 9....
Resource Type:: Dissertation
Full Text:: James D. White Studies towards the total synthesis of (+)-Phomactin A (1), D (6), and G (9), fungal

Spectrophotometry of molybdenum, tungsten and chromium chelates of quercetin

Creator:: Mitchell, Lloyd James
Abstract:: Quercetin (3, 3', 4', 5, 7-pentahydroxyflavone) reacts with hexavalent molybdenum, tungsten and chromium to form chelates soluble in an ethanol-water medium. This color reaction has been investigated with a view to its possible application in the spectrophotometric determination of trace amounts of these metals. In the development of the method,...
Resource Type:: Dissertation
Full Text:: chelates of quercetin AN ABSTRACT OF THE THESIS OF Lloyd James Mitchell for the Ph. D. in Analytical

Studies toward the total synthesis of sanglifehrin A

Creator:: Suttisintong, Khomson
Abstract:: Studies toward synthesis of subunits of sanglifehrin A, an immunosuppressant featuring a highly substituted [5,5]-spirolactam moiety as well as a 22-membered macrocycle are described. The macrolactone contains a peptidic backbone characterized by an unusual [beta]-substituted (S)-piperazic acid and (S)-m-hydroxyphenylalanine units. These studies resulted in the synthesis of advanced intermediate 358...
Resource Type:: Dissertation
Full Text:: :______________________________________________________ James D. White Studies

Adapting the Methylene Blue Sulfide Detection Method for Use in a Microfluidic in-situ Monitoring Device

Creator:: Monares, Shane W.
Abstract:: Sulfide is an important species to measure in environmental water samples. The spectrophotometric detection method for reduced sulfur species (sulfide) based on generation of methylene blue was adapted to work in an apparatus utilizing microfluidic PDMS mixing and observation cells with flow channels in the 100 μm range. The benefits...
Resource Type:: Honors College Thesis
Full Text:: : ________________________________________________ James D. Ingle Jr. Sulfide is an important species to measure in environmental

Simultaneous spectrophotometric determination of barium and strontium using sulfonazo III

Creator:: Kemp, Paul James
Abstract:: A simultaneous direct spectrophotometric method for the determination of barium and strontium using Sulfonazo III has been developed making use of the chelons EGTA and CDTA at controlled pH values. An absorbance study of the barium and strontium complexes of Sulfonazo III revealed that there is no pH sensitivity of...
Resource Type:: Masters Thesis
Full Text:: and strontium using sulfanzo III AN ABSTRACT OF THE THESIS OF PAUL JAMES KEMP for the MASTER OF

ScholarsArchive@OSU

Synthetic studies on marine natural products : Part 1. Synthesis of the sesquiterpenoid dihydropallescensin D via manganese(III)- mediated carbocyclization. Part 2. Approaches toward the synthesis of prianosin and discorhabdin alkaloids

Asymmetric synthesis of cyclopropanes via a "zipper reaction"

Design, characterization, and application of spectrometers for determination of low-level dissolved oxygen with small-volume sampling methodology

Part I: Synthesis and evaluation of synosutine as an inhibitor of serotonin, norepinephrine, and dopamine transporters Part II: Asymmetric approach to the tetracyclic core of neomangicol A

Studies toward the synthesis of halichlorine and pinnaic acid

Studies towards the total syntheses of (+)-phomactins A, D and G

Spectrophotometry of molybdenum, tungsten and chromium chelates of quercetin

Studies toward the total synthesis of sanglifehrin A

Adapting the Methylene Blue Sulfide Detection Method for Use in a Microfluidic in-situ Monitoring Device

Simultaneous spectrophotometric determination of barium and strontium using sulfonazo III

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