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Synlett 1991; 1991(11): 800-802
DOI: 10.1055/s-1991-20881
DOI: 10.1055/s-1991-20881
letter
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Unusual C,N-Dialkylation of α,N-Alkanesulfonamide Dianions: A New Route to Tetrahydro-1,4,3-Oxathiazine 4,4-Dioxides1
Further Information
Publication History
Publication Date:
07 March 2002 (online)
![](https://www.thieme-connect.de/media/synlett/199111/lookinside/thumbnails/10.1055-s-1991-20881-1.jpg)
The reaction of gaseous formaldehyde with N-benzyl benzylsulfonamide dianion, prepared from the corresponding sulfonamide and 2.1 equivalents of butyllithium, has led to the unusual formation of a new tetrahydro-1,4,3-oxathiazine 4,4-dioxide heterocycle substituted at position 5 (7-benzyl-5-phenyltetrahydro-1, 4,3-oxathiazine 4,4-dioxide).