Development of a new glycosidation method to obtain 2-deoxy-beta-glycosides, and study of syntheses of the trisaccharide chain in the aureolic acid | Posted on:2000-09-05 | Degree:Ph.D | Type:Dissertation | University:City University of New York | Candidate:Dios, M. Angeles | Full Text:PDF | GTID:1461390014967160 | Subject:Organic Chemistry | Abstract/Summary: | | Part 1. An innovative method for the syntheses of 2-Deoxy-beta-glycosides was developed. A bicyclic glycosyl donor was formed through a hetero Diels-Alder reaction. This 1,4 oxathiin system formed in the Diels-Alder reaction was used to obtain a disaccharide through conventional activation in the presence of a suitable acceptor. Reduction of the sulfur at C2 of the donor unit in the disaccharide by treatment with Ra-Ni produced 2- deoxy-glycosides in good yield. Studies on the novel stereoelectronic behavior of the bicyclic glycosyl donors were conducted.;Part 2. The glycosidation method developed in part 1 was applied to a study of the syntheses of the trisaccharide unit present in the aureolic acid. Several cycloadducts were synthesized and the stereoselectivity of hetero Diels-Alder reactions was studied. | Keywords/Search Tags: | Method, Syntheses | | Related items |
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