A method for the preparation of C1 O-linked and C1 N-linked glycooxazolines in two steps from common precursor amides and glycals will be presented. The analogous preparation of thiooxazolines and ureaoxazolines will also be described. Methods to form other heterocycles such as lactams, oxazoles and oxazolidines from these precursors, as well as, the ring-opening reactions of the carbohydrate-fused oxazolines leading to the formation of N-chloroimines, oximes, hydroxylamines and amino glycosides will be discussed.
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