Benzothiazine and benzothiazepine derivatives: structures of N-p-bromophenyl-6,7-dimethoxy-1,2-benzothiazin-3(4H)-one 1,1-dioxide (BBTZ) and 4,5-dihydro-8,9-dimethoxy-N-(5-methyl-2-pyridyl)-1,2-benzothiazepin-3-one 1,1-dioxide (MPTE)
โ Scribed by Salem, G. ;Filippakis, S. E. ;Hountas, A. ;Terzis, A.
- Book ID
- 114503425
- Publisher
- International Union of Crystallography
- Year
- 1986
- Tongue
- English
- Weight
- 422 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0108-2701
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๐ SIMILAR VOLUMES
## Abstract The ^1^H and ^13^C NMR spectra of compounds **1**โ**11** and **16**โ**22** in CDCl~3~ and DMSOโ__d__~6~ solutions allowed structural assignment to regioisomers **1/5** and **2/6** and their regioselective cyclization products **16โ18** utilizing oneโ and twoโdimensional NMR techniques (
## Abstract The reaction of 2โchloroโ4โ(methylsulfonyl)benzoyl chloride (5) with 1โmethylโ1__H__โ2,1โbenzothiazinโ4โ(3__H__)โone 2,2โdioxide (4) gave the __O__โbenzoyl compound, 1โmethylโ2,2โdioxidoโ1__H__โ2,1โbenzothiazinโ4โyl 2โchloroโ4โ(methylsulfonyl)benzoate (6), which rearranged to give the C