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Filtering by: Creator Ponzetti, Jeanne M. Remove constraint Creator: Ponzetti, Jeanne M. Advisor White, James D. Remove constraint Advisor: White, James D.

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  • Approaches toward synthesis of the mycosporins

    Creator:
    Cammack, Janice H.
    Abstract:
    The mycosporins, formerly called P310's are secondary metabolites of fungi closely associated with fungal reproductive processes that require light. The structurally related iminomycosporins are found in marine plants and animals and may also have functions related to light. In this study, approaches toward the asymmetric synthesis of the mycosporins are...
    Resource Type:
    Dissertation
    Full Text:
    Davies, Bonnie Hommel and Jeanne Reisner for Janice H. Cammack ACKNOWLEDGEMENTS I would like to

  • Synthesis of a model of the spiroketal portion of avermectin B

    Creator:
    Warrier, Ulhas S.
    Abstract:
    Avermectin Bia is a member of a class of medicinally important natural products known for its potent antiparasitic activity and interesting structural features. In this thesis, synthesis of a model for the spiroketal portion of the avermectins is presented. Oxidation of (S)-2-methylbutanol, followed by a stereoselective chromium mediated reaction with...
    Resource Type:
    Masters Thesis
    Full Text:
    , 1987 Typed by Jeanne Reisner for Ulhas Warrier ACKNOWLEDGEMENTS My sincere thanks . . to

  • Chiral synthesis of monic acid C

    Creator:
    Theramongkol, Parinya
    Abstract:
    Bromoalkoxylation of dihydropyran with bromine and 1-borneol, followed by dehydrobromination and epoxidation, afforded trans-2-1- bornyloxy-3,4-epoxytetrahydropyran as a major product. This was treated with sodium phenylselenide to give a 1:1 mixture of (2R,3R,4R)- 2-1-bornyloxy-3-hydroxy-4-phenylselenotetrahydropyran and its (2S,3S, 4S) diastereomer. Elimination of the selenoxide, derived from oxidation of the former with hydrogen...
    Resource Type:
    Dissertation
    Full Text:
    Redacted for Privacy Dean of Gradu School d Date thesis is presented prember 12. 1985 Typed by Jeanne

  • Synthesis of two subunits of avermectin B1a

    Creator:
    Dantanarayana, Anura Pathmasiri
    Abstract:
    Avermectins are a group of potent anthelmintic agents produced by Streptomyces avermitilis. They are active at extremely low dosages and are now in commercial use. In this study, the synthesis of two segments of avermectin B[subscript 1a] are described. The synthesis of the hexahydrobenzofuran subunit (segment A) began with the...
    Resource Type:
    Dissertation
    Full Text:
    Graduate chool ( Date thesis is presented August 24, 1987 Typed by Jeanne Reisner for Anura Pathmasiri

  • Approaches to the synthesis of the macrolactone pyrrolizidine alkaloids (-)-integerrimine and (+)-usaramine

    Creator:
    Jayasinghe, Lalith Ratnasiri
    Abstract:
    A formal total synthesis of the macrolactone pyrolizidine alkaloid (-)-integerrimine (2), from R-(+)-citronellal (93) is described. Aldehyde 93 was converted to exo methylene derivative 94 which was reduced to allylic alcohol 95. The epoxides 96 and 98, obtained in a ratio of 3:1 respectively by Sharp less epoxidation of 95...
    Resource Type:
    Dissertation
    Full Text:
    Redacted for privacy Dean of Graduate SCol Date thesis is presented May 2, 1988 Typed by Jeanne Reisner

  • 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:
    Typed by Jeanne Reisner for Todd Charles Somers ACKNOWLEDGEMENT I would like to sincerely thank