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Rates Of Acidic Hydrolysis Of Triptych Boroxazolidines, Ronald Keith Stump

University of the Pacific Theses and Dissertations

Upon looking at the results of calculation of the rate constants given in Table 2, there are revealed some general trends as to the influence of the substituent groups on the values of the rate constants. If the rate constants of the reaction are considered at a fixed temperature, the rates of reaction in Group I decrease as the substituent is gradually changed from methyl to isopropyl. As soon as the substituent is changed from alkyl to an ether type,the rate of cleavage increases nearer to that of the parent compound again. The rate of cleavage of the nitrogen-boron bond …

An Experimental Investigation Of Coloring Matter In Canna Indica Flowers, James Clinton Vogt

University of the Pacific Theses and Dissertations

The research was carried out for the purpose of isolating and identifying the coloring matter in flowers of the canna indica (canna lily) variety. It was done by extracting the pigment from flower petals with methanol, amyl alcohol, and other solvents, and crystallizing the pigment as a salt. Physical properties such as solubility, color reactions, spectra and others were examined for this pigment. Chemical properties and degradation products were also examined in order to identify the chemical structure of the pigment.

Identification Of The Products And Mechanism Of Decomposition Of Thiazate, Paul Edward Williams

University of the Pacific Theses and Dissertations

This work is an additional facet of the research undertaken by Dr. Herschel Frye of the Department of Chemistry of the University of the Pacific while he was a graduate student at the University of Oregon. Frye succeeded in making an analytical reagent for zinc and other transition metals similar to dithiszone but water soluble. His approach was to to sulfonate the benzene rings thus giving water solubility because of the ionic nature of the sulfonic acid. The new reagent-tensed thiazate--was quite successful in its purpose, but the sections of the compound were somewhat different than dithizone. The purpose of …

3-Amino-2,5-Dihydroxy-5-Sulfo-Benzoic Acid, Hideo Tomomatsu

University of the Pacific Theses and Dissertations

It seems possible that efforts to discover essential chemical differences which might exist between normal and malignant cells will eventually reveal the secret of cancer and thereby lead to new approaches to safer and more selective chemotherapy.

One objective of this study is to find that part of this molecule that causes it to concentrate in the tumor and thence make a smaller size compound which has similar concentration characteristics to tumor as tetracycline. For this purpose, an attempt was made in this study to synthesize the right side ring of Chlorotetracycline, the structure of which is shown below. [see …

Preparation Of Thiochalcone From Thioacetophenone, Thomas Joseph Reilly

University of the Pacific Theses and Dissertations

This thesis covers the practical research done on the condensation of thioacetophenone with benzaldehyde and the library research covers the chemistry of thioketones and the thioflavanones. Most of the thioketones have been made by dissolving a ketone in ethanol, usually absolute although 95 percent was also used, saturating the solution with anhydrous hydrogen chloride at ice temperature, then admitting hydrogen sulfide for several hours. This method was first used by Fromm and Baumann when they made thioacetophenone from acetophenone. David Shirley also gives theis process in his book “Preparation of Organic Intermediates” published by Wiley and Sons in New York. …