Synthesis of 2-Substituted 2,3-Dihydro-1,4-benzothiazine-3-thiones via Iminophosphoranes
摘要:
2-(Substituted methylsulfanyl)anilines (5) were treated with triphenylphosphine dibromide to yield iminophosphoranes (6), whose aza-Wittig reaction with carbon disulfide gave 2-(substituted methylsulfanyl)phenyl isothiocyanates(8). Cyclization of 8 by strong bases afforded 2-substituted 2,3-dihydro-1,4-benzothiazine-3-thiones (10).
Synthesis of 2-Substituted 2,3-Dihydro-1,4-benzothiazine-3-thiones via Iminophosphoranes
摘要:
2-(Substituted methylsulfanyl)anilines (5) were treated with triphenylphosphine dibromide to yield iminophosphoranes (6), whose aza-Wittig reaction with carbon disulfide gave 2-(substituted methylsulfanyl)phenyl isothiocyanates(8). Cyclization of 8 by strong bases afforded 2-substituted 2,3-dihydro-1,4-benzothiazine-3-thiones (10).
Synthesis of 2-Substituted 2,3-Dihydro-1,4-benzothiazine-3-thiones via Iminophosphoranes
作者:Masahiko Takahashi、Masaru Ohba
DOI:10.3987/com-95-7171
日期:——
2-(Substituted methylsulfanyl)anilines (5) were treated with triphenylphosphine dibromide to yield iminophosphoranes (6), whose aza-Wittig reaction with carbon disulfide gave 2-(substituted methylsulfanyl)phenyl isothiocyanates(8). Cyclization of 8 by strong bases afforded 2-substituted 2,3-dihydro-1,4-benzothiazine-3-thiones (10).