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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:: 14 1998. Title: Synthetic Studies of Nonadrides Abstract approved: James D. White An asymmetric

Approaches to the total synthesis of verrucarol

Creator:: Hill, David E. (David Edwin) 1954-
Abstract:: Verrucarol is the sesquiterpene portion of a number of macrocyclic di- and triesters of potential medicinal importance. In this study, a novel approach to the synthesis of this fungal metabolite is presented. An A-B-C route was investigated in which C-3 and C-4 of the C-ring were emplaced using a [2+2]...
Resource Type:: Dissertation
Full Text:: privacy (Pr. James D. White Verrucarol is the sesquiterpene portion of a number of macrocyclic di- and

Cyclization of olefinic β-ketoesters. An approach to the synthesis of aplysistatin

Creator:: Skeean, Richard William
Resource Type:: Dissertation
Full Text:: . An Approach to the Synthesis of Aplysistatin Abstract Approved: Redacted for privacy 7/ Dr. James D

Natural product synthesis via cyclobutanes : part I, Asymmetric synthesis of (+)-byssochlamic acid, part II, An approach to the nootropic agent huperzine A

Creator:: Kim, Jungchul
Abstract:: PART I. Asymmetric syntheses of both natural (+)- and nonnatural (-)-byssochlamic acid via a [2+2] photoaddition-cycloreversion strategy are described. X-ray crystallographic analysis of the cyclohexylamine salt 99 showed that the structure of the monomethyl ester 100 from esterase hydrolysis of 44 was originally misassigned as 56. The enantiomeric relationship of...
Resource Type:: Dissertation
Full Text:: approved: James D. White PART I. Asymmetric syntheses of both natural (+)- and nonnatural

Excited state molecular structural evolution and chemical reactivity studied by femtosecond stimulated Raman spectroscopy

Creator:: Han, Fangyuan
Abstract:: In this dissertation, my research work on excited state dynamics of small organic molecules in solutions is presented. Using femtosecond stimulated Raman spectroscopy (FSRS) as the main experimental tool, the excited state hydrogen-bonding dynamics (ESHBD) of Coumarin 102, a common laser dye molecule, in ethanol solution is examined with <150...
Resource Type:: Dissertation
Full Text:: (b); deuterated chloroform CDCl3 (c); chloroform CHCl3 (d); and ethanol (e) .......... 74 Figure

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

A micro study of the reduction of organic hydroxyl compounds with hydriodic acid

Creator:: Mitchell, Herschel K.
Resource Type:: Masters Thesis
Full Text:: D..Ratesofthereactions.......... ....... ...... 9 E..Factors affecting the decomposition of HI

Progress Towards the Total Synthesis of Bazzanin K

Creator:: Salvo, Patrick
Abstract:: Molecular chirality plays a critical role in chemistry, biology, and medicine. To study and better understand conformational chirality, it is necessary to obtain structurally interesting molecules that exhibit this form of chirality. Our lab utilizes total synthesis and methodological development to obtain conformationally chiral natural products of interest. We believe...
Resource Type:: Masters Thesis
Full Text:: additional biphenyl bond between the C and D rings forming a dihydrophenanthrene moiety. This intriguing

Designing chiral rhenium (VII) trioxo complexes

Creator:: Juniku, Rajan B.
Abstract:: The epoxide deoxygenation reaction is formally the reverse of theepoxidation reaction. Compared to epoxidation, which has reached its fullmaturity, epoxide deoxygenation has not been as intensively developed.Among the few deoxygenation reagents, a handful are catalytic in a metalcomplex, show high stereospecificity and operate under mild conditions. Acommon feature of all...
Resource Type:: Masters Thesis
Full Text:: The intermediate of epoxide deoxygenation with Co2(CO)8 ........... 9 1.2 d orbital of metal

Substituent control in the oxy-Cope rearrangements of 1-vinyl-trans-cyclotridec-3-en-1-ol systems

Creator:: Daruwala, Khushroo Peshotan
Abstract:: The thermal and anionic rearrangements of substituted 1-vinyltrans- cyclotridec-3-en-l-ol compounds have been studied to determine what effects substituents would have on the sigmatropic shift when placed on the two positions of the 1-vinyl group. For the thermal rearrangements, the a-substituted vinyl-trans-cyclotridecenols gave both the [3,3] and [1,3] shift products of...
Resource Type:: Dissertation
Full Text:: diradical intermediate. D. L. J. Clive has devised a strategy involving repetitive ring expansion of

ScholarsArchive@OSU

Synthetic studies of nonadrides

Approaches to the total synthesis of verrucarol

Cyclization of olefinic β-ketoesters. An approach to the synthesis of aplysistatin

Natural product synthesis via cyclobutanes : part I, Asymmetric synthesis of (+)-byssochlamic acid, part II, An approach to the nootropic agent huperzine A

Excited state molecular structural evolution and chemical reactivity studied by femtosecond stimulated Raman spectroscopy

Studies toward the synthesis of halichlorine and pinnaic acid

A micro study of the reduction of organic hydroxyl compounds with hydriodic acid

Progress Towards the Total Synthesis of Bazzanin K

Designing chiral rhenium (VII) trioxo complexes

Substituent control in the oxy-Cope rearrangements of 1-vinyl-trans-cyclotridec-3-en-1-ol systems

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