ABSTRACT Cyclic thioenamines, an imidazothiazine and a bicyclic amidodithiane were synthesised by α-thiol additions to ω-formylglycine (FGly) enol tosylates. The syntheses included six- to twelve- membered rings and occasionally, their corresponding dimers. The imidazothiazine was prepared from a tripeptide embodying a β-turn-directing 2-(tritylthio) acetamide moiety and the dithiaazabicyclo [7.3.1] tridecane (amidodithiane) from a lipoic acid serine conjugate.
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