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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.
91

Stereochemical study of the fragmentation of 1, 10-decalindiols to 5-cyclodecenones

Hiegel, Gene Andrew, January 1965 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1965. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliography.
92

Stereocontrolled synthesis of silyl enol ethers using [alpha]-phenyltyhio silyl ketones

Holtan, Ronald Charles. January 1984 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1984. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 167-185).
93

Palladium (II)-catalyzed stereoselective formation of [alpha]-O-glycosides

Schuff, Brandon Patrick. January 2007 (has links) (PDF)
Thesis (M.S.)--Montana State University--Bozeman, 2007. / Typescript. Chairperson, Graduate Committee: Hien Nguyen. Includes bibliographical references.
94

StereoElectronic Controls in the Preparation of 1-Benzyl-l, 2, 4, 5-Tetrahydro-(3H)-2-Benzazepin-3-ones Via Beckmann Rearrangement

Silvary, Sunil Raj January 2007 (has links) (PDF)
No description available.
95

Resolution of enantiomers using cyclodextrins in NMR and HPLC

Cooper, Andrew Donovan January 1991 (has links)
No description available.
96

The stereochemistry of some rearrangement reactions of steroids

Truneh, A. January 1987 (has links)
No description available.
97

Phosphorus ligands derived from terpene alcohols as stereochemical probes

Wang, Jihong 19 July 2018 (has links)
A series of optically active tertiary phosphorus ligands, [special characters omitted] (R = bornyl, menthyl, or isopinocamphyl; n = 1, 2, or 3, 1 – 9), containing chiral alkoxy groups derived from natural terpene alcohols, menthol, borneol, and isopinocampheol, are synthesized and characterized by various spectroscopic techniques. The reactions of these ligands with iron and cobalt carbonyl complexes are carried out, giving monomeric mono- and di-substituted iron(0) and dimeric di-substituted cobalt carbonyl complexes [special characters omitted]. The characterization of these complexes by IR and NMR spectrometries is discussed. Results of preliminary studies on hydroformylation reaction under oxo conditions catalysed by several cobalt complexes are presented. Pyrazolyl bridged di-iridium(I) systems, [special characters omitted], are prepared as diastereomers with unequal thermodynamic distribution. The X-ray crystal structure of 41 shows cocrystallization of the two diastereomers in the same unit cell, which provides 1:1 kinetic distribution of the two isomers. Kinetic studies of the interconversion from the kinetic ratio to the thermodynamic ratio of the two diastereomers in 41 indicates the existence of a slow inversion process of the six-membered central metallocycle in 41. Oxidative addition of Mel to 41 generates a pair of diastereomeric adducts (43) in kinetic distribution, which is slowly converted to its thermodynamic distribution, implying a very slow reductive elimination of Mel. Oxidative additions of exo- and endo-norbornyl iodide to [special characters omitted] results in same product (44). Possible mechanisms for this process are discussed. Bisdiphenylphosphinoalkylsilane containing chiral menthoxy group [special characters omitted] is prepared and characterized. Its four-coordinate square planar platinum complex [special characters omitted] and five-coordinate iridium(I) complex [special characters omitted] are synthesized. Isomerizations of 49 and its CO adducts, [special characters omitted] (55 and 56), are studied in relation to their methyl analogues. / Graduate
98

Prototypes of black wattle tannins and their stereochemistry

Drewes, Siegfried Ernst January 1963 (has links)
A number of interrelated flavonoid compounds, present in trace quantities in mature black wattle (Acacia mearnsii De Wild) bark, have been isolated and identified for the first time. They include a) the resorcinol-pyrogallol analogues, (+)-leuco-robinetinidin (7,5',4',5'-tetrahydroxyflavan-3,4-diol), dihydrorobinetin (7,5',4',5'-tetrahydroxyflavan-3-ol-4-one) and robtein (2',4',5,4,5- pentahydroxychalcone) and b) the resorcinol-catechol analogues, (+)-leuco-fisetinidin (7,3',4'-trihydroxyflavan-3,4-diol), fustin (7,3',4'-trihydroxyflavan-3-ol-4-one), (-)-fisetinidol (7,3',4'trihydroxyflavan- 3-ol), butein (2',4',3,4-tetrahydroxychalcone) and butin (7,5',4'-trihydroxyflavan-4-one). In addition, two flavonol glycosides, myricitrin (3,5,7,3',4',5'-hexahydroxyflavone-3-rhamnoside ) and quercitrin (5,5,7,5',4'-pentahydroxyflavone-3-rhamnoside), which belong to the phloroglucinol-pyrogallol and phloroglucinolcatechol class of flavonoids respectively, were isolated from immature bark. These represent the only glycosides isolated hitherto from wattle bark or heartwood extracts. Summary, p. i.
99

The study of some stereochemical problems by X-ray analysis

Candeloro, M. S. January 1970 (has links)
No description available.
100

Stereochemical and spectrographic studies of alicyclic systems

Hey, David Gordon January 1965 (has links)
No description available.

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