An improved procedure for the preparation of N-aryl substituted 4H-1,4-benzothiazine 1,1-dioxide derivatives

Authors
Lopez, SE Godoy, MV Urdaneta, N Rosales, M
Citation
Se. Lopez et al., An improved procedure for the preparation of N-aryl substituted 4H-1,4-benzothiazine 1,1-dioxide derivatives, PHOSPHOR SU, 156, 2000, pp. 69-80
Citations number
20
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
ISSN journal
10426507 → ACNP
Volume
156
Year of publication
2000
Pages
69 - 80
Database
ISI
SICI code
1042-6507(2000)156:<69:AIPFTP>2.0.ZU;2-9
Abstract
An improved procedure for the synthesis of N-aryl substituted 4H-1,4-benzot hiazine 1,1-dioxide 2-carboxylic acid-esters derivatives is reported. In th is new, efficient methodology, silver nitrate was used as a catalyst for th e cyclization of N-aryl-phenylsulfonyl-acrylates 6-11 using potassium carbo nate in dimethylformamide to the corresponding title compounds in high yiel ds.