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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
111

Synthesis of the naturally occurring cyclopropenoids malvalic and sterculic acids

Kray, William David 20 August 1965 (has links)
The two naturally occurring cyclopropene fatty acids, sterculic and malvalic, have been synthesized. The cyclopropene ring was made by inserting a methylene unit into an acetylenic linkage. The synthesis of methyl sterculate was repeated using diethyl aluminum chloride, diazomethane, and methyl stearolate. Methyl malvalate was totally synthesized. Diethyl malonate was condensed with 1, 5-dibromopentane to give 7-bromoheptanoic acid. 1-Decyne was reacted with 7-bromoheptanoic acid to give 7-heptadecynoic acid. 7-Heptadecynoic acid was esterified with diazomethane. The cyclopropene ring was generated using diethyl aluminum chloride and diazomethane. The reaction worked very well and in most cases the yields exceeded 50 percent. / Graduation date: 1966
112

Palladium-gekataliseerde substitusiereaksie van pseudoglikale

25 November 2014 (has links)
M.Sc. (Chemistry) / Please refer to full text to view abstract
113

An attempted synthesis of 9, 10-dihydro-9, 10-diazanaphthalene.

January 1974 (has links)
Kwok Ka-chu. / Thesis (M.Phil.)--Chinese University of Hong Kong. / Bibliography: leaves 53-56.
114

Synthesis and reactions of bicyclic [n.4.1] Ketones.

January 1974 (has links)
Thesis (M.Phil.)--Chinese University of Hong Kong. / Bibliography: leaves 59-62.
115

L-ascorbic acid in concentrated sulfuric acid : improved synthesis of L-ascorbic acid 6-sulfate

Lillard, Donald W January 2011 (has links)
Typescript. / Digitized by Kansas Correctional Industries
116

Synthesis, structural characterization, and reactivity of 4fn/d0 metal complexes incorporating new carboranyl ligands. / CUHK electronic theses & dissertations collection

January 2007 (has links)
Shen, Hao. / "July 2007." / n and 0 in "4fn/d0" in title is superscript. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2007. / Includes bibliographical references (p. 207-220). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstracts in English and Chinese.
117

Synthesis and Characterization of Novel Fluorine Containing Alkylsulfonyls and Sulfonates : Fluorinated Sulfonyl Methanes and Derivatives

Holcomb, Nelson R. 07 July 1995 (has links)
A series of salts of the strong fluorocarbon acid bis(trifluoromethylsulfonyl)methane were made: (CF3S02 ) 2CHK, (CF3S02 ) 2CHLi, [ (CF3S02 ) 2CH] 2Ca, [ (CF3S02 ) 2CH] 2Hg, (CF3S02 ) 2CHAg, [ (CF3S02 ) 2CH] 3La. Their reactivity and use as organic intermediates were investigated. The salts were made from their corresponding carbonates, oxides, or hydrides. The reaction times for the salts is generally short, however the purification process was laborious, involving recrystallization from organic solvents and drying under vacuum. The lithium salt is being evaluated as a solid state battery electrolyte. Derivatives of bis(trifluoromethylsulfonyl)methane were made by using the salts as nucleophiles in organic reactions. Reactions with Br2 , CH2=CH2CH2Br, CH3CH2CH2I, and OCH2CHCH2Br were carried out to make: bis(trifluormethylsulfonyl)bromomethane, 4,4-bis(trifluormethylsulfonyl)butene-1, 1,1-bis(trifluormethylsulfonyl)butane, and 4,4-bis(trifluormethylsulfonyl)-1,3-epoxybutane In addition, work was carried out on the synthesis of the polymer -(-O-CH2-C(CH20CF2CF2S02F)H-)n- and the corresponding lithium salt. The polymer was treated with aqueous lithium hydroxide in order to convert the S02F group to a S03-Li+ group. This salt is being investigated as a solid state ion conducting polymer. All products were characterized by infrared spectroscopy, mass spectroscopy, 1H and 19F nuclear magnetic resonance spectroscopy, elemental analysis, and melting points.
118

Synthesis of methyl 2,3,6-tri-0-benzyl-a-D-hexopyranosides.

Manca, Adriano January 1970 (has links)
No description available.
119

The synthesis of methyl trihydroxyeicosatrienoates and related compounds /

Chong, Chit-Looi. January 1983 (has links)
No description available.
120

Total synthesis of (+)-bourgeanic acid and conformational analysis of its dilactone

Johnson, Alan T. (Alan Thomas), 1957- 15 November 1990 (has links)
Graduation date: 1991

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