Synthesis, Inhaltsverzeichnis PAPER © Georg Thieme Verlag Stuttgart · New York Asymmetric Synthesis of cis-3,4-Disubstituted β-Sultams Dieter Enders*, Alexander MollInstitut für Organische Chemie, Rheinisch-Westfälische Technische Hochschule, Landoltweg 1, 52074 Aachen, GermanyFax: +49(241)8092127; e-Mail: Enders@rwth-aachen.de; Artikel empfehlen Abstract Artikel einzeln kaufen Alle Artikel dieser Rubrik Abstract The asymmetric synthesis of cis-3,4-disubstituted β-sultams is reported. The protocol is based on the oxidation of 1,2-aminothiols with H2O2 and ammonium heptamolybdate. The chlorination of the resulting β-amino sulfonic acids was achieved utilising a solution of phosgene in toluene. The β-aminosulfonyl chlorides obtained were cyclised to the title compounds under basic conditions without epimerisation (de, ee ≥96%) and good overall yields (17-59%). In addition, the N-Cbz-protection of β-sultams was easily accomplished. 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