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We report here a practical access to a series of five-membered cyclosulfamides (1,2,5-thiadiazolidines 1,1-dioxides) N 2 substituted by the BOC group. These compounds are synthesized starting from chlorosulfonyl isocyanate and nitrogen mustards or amino acids. The derivatization of amino acids can lead to an alkyl group on C-4 with a well-defined configuration; in this case the N 5 ...
A series of chiral sulfahydantoins have been synthesized by alkaline cyclization starting from N-sulfamylaminoacid methyl esters. Regioselective glycosylation of these pseudopyrimidic heterocycles was carried out with a benzyl protecting group on the N-sulfonylcarbamic position. Best glycosylation results were obtained by preliminary silylation of sulfahydantoins, and their condensation with a tetraacylribofuranose...
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