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Synthetic studies on alkaloids : part I, an approach toward the synthesis of (̳+)-koumine : part II, an approach toward the synthesis of (̳+)-morphine

Creator:: Stappenbeck, Frank
Resource Type:: Dissertation
Full Text:: and synthetic puzzles posed by alkaloid chemistry. Total synthesis of alkaloid natural products

Synthesis of epothilones and epothilone analogues

Creator:: Sundermann, Kurt F.
Abstract:: A convergent synthesis of epothilone B that generates all seven of its asymmetric centers in a completely stereoselective fashion has been completed. Key reactions include an anti-Felkin aldol condensation to set the C6 and C7 stereochemistry, a directed α-hydroxylation to install the C15 (S)-hydroxyl substituent, and a Wittig condensation to...
Resource Type:: Dissertation
Full Text:: state conformation by analysis of vicinal coupling constants and nuclear Overhauser enhancement

Structural and synthetic studies of higher terpenoids : Part I. The absolute configuration of (-)-botryococcene : Part II. Total synthesis of (±)-2-desoxystemodinone

Creator:: Somers, Todd Charles
Resource Type:: Dissertation
Full Text:: Chemistry presented on July 20, 1987. Title: Structural and Synthetic Studies of Higher Terpenoids: Part I

Synthetic studies of nonadrides

Creator:: Drapela, Nicholas Ernest
Abstract:: An asymmetric approach to the synthesis of byssochlamic acid (1) is described. Regioisomeric enzymatic differentiation is described in the selective hydrolysis of dimethyl ester 30 by porcine liver esterase. Chiral dimethyl ester 42 was prepared by desymmetrization of cyclopentene 34 using porcine liver esterase. A key intramolecular [2+2]cycloaddition-cycloreversion photometathesis of...
Resource Type:: Dissertation
Full Text:: convergent, and it broke new ground in the area of nonadride chemistry. In a later approach,21 White and co

Synthesis of furanoeremophilane sesquiterpenoids

Creator:: Shanmugham, Meenakshi Sundaram
Abstract:: Two approaches to the tricyclic core of the furanoeremophilane sesquiterpenoids are described. The first approach entails a projected Diels-Alder/retro Diels-Alder reaction of an acetylenic oxazole 64. Construction of the pivotal aldehyde 67 commenced from ketone 68. The acetyenic moiety was then introduced via a Felkin-Ahn addition of lithiopropyne to aldehyde...
Resource Type:: Dissertation
Full Text:: the degree of Doctor of Philosophy in Chemistry presented on January 13. 2Q4 Title: SYNTHESIS OF

An approach toward the synthesis of euonyminol and cathedulin K- 19

Creator:: Shin, Hyunik
Abstract:: A synthetic approach toward the two major fragments of cathedulin K-19, euonyminol (4) and dimethyl cathate (69), was investigated. Synthesis of dimethyl cathate was accomplished in 3 steps starting from 73. Efforts directed towards the synthesis of euonyminol, a highly oxygenated dihydroagarofuran sesquiterpene, was advanced to a stage in which...
Resource Type:: Dissertation
Full Text:: Chemistry presented on January 11, 1994. Title: An Approach Toward the Synthesis of Euonyminol and

Synthetic studies on natural products : Part I. The total synthesis of ±-euonyminol and ±-3,4-dideoxymaytol : Part II. The absolute configuration and enantioselective synthesis of curacin A

Creator:: Kim, Tae-Seong
Resource Type:: Dissertation
Full Text:: synthesis of ±-euonyminol and ±-3,4-dideoxymaytol : Part II. The absolute configuration and enantioselective

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

Creator:: Johnson, Alan T. (Alan Thomas), 1957-
Resource Type:: Dissertation
Full Text:: Philosopy in Chemistry presented on November 15. 1990. Title: Total Synthesis of (+)-Bourgeanic Acid and

Approaches to the synthesis of trichothecenes

Creator:: Kim, No-soo
Resource Type:: Dissertation
Full Text:: Carbonyl of 133 9. Nuclear Overhauser Enhancement of H1 and H5 38 Upon Irradiation of the C7 Methyl Group

Total synthesis of indole alkaloids: pt. 1. Asymmetric synthesis of (-)-ibogamine. pt. 2. An approach toward the synthesis of koumine

Creator:: Choi, Younggi
Abstract:: PART I. The preparation of (-)-ibogamine (1) in fourteen steps from benzoquinone and in 10% overall yield is a powerful illustration of the value of the asymmetric Diels-Alder reaction as a starting point in a multistep synthesis. All four cycloadducts, 70, 77, 84 and 96, obtained with the (S)-BINOL-TiCl₂ complex...
Resource Type:: Dissertation
Full Text:: chemistry because of the intriguing structures and interesting biological activities of these products of

ScholarsArchive@OSU

Synthetic studies on alkaloids : part I, an approach toward the synthesis of (̳+)-koumine : part II, an approach toward the synthesis of (̳+)-morphine

Synthesis of epothilones and epothilone analogues

Structural and synthetic studies of higher terpenoids : Part I. The absolute configuration of (-)-botryococcene : Part II. Total synthesis of (±)-2-desoxystemodinone

Synthetic studies of nonadrides

Synthesis of furanoeremophilane sesquiterpenoids

An approach toward the synthesis of euonyminol and cathedulin K- 19

Synthetic studies on natural products : Part I. The total synthesis of ±-euonyminol and ±-3,4-dideoxymaytol : Part II. The absolute configuration and enantioselective synthesis of curacin A

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

Approaches to the synthesis of trichothecenes

Total synthesis of indole alkaloids: pt. 1. Asymmetric synthesis of (-)-ibogamine. pt. 2. An approach toward the synthesis of koumine

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