Sulfated Zirconia as an Efficient Catalyst for Sulfonylamidomethylation of Benzylsulfonamides and 2-Phenylethanesulfonamides: Effect of Catalyst Thermal Treatment
摘要:
The synthesis of 3,4-dihydro-1H-2,3-benzothiazine 2,2-dioxides and 1,2,4,5-tetrahydro-3,2-benzothiazepine 3,3-dioxides is studied using sulfated zirconia as catalyst. The sulfated zirconia calcined at 550 A degrees C achieved a high selectivity which is attributed to the formation of a tetragonal phase. In addition, the catalyst can be reused up to three times without loss of its catalytic activity.
Synthesis of 1,2,4,5-Tetrahydro-3,2-benzothiazepine 3,3-Dioxides Using Amberlyst-15
作者:Leandro D. Sasiambarrena、Alicia S. Cánepa、Rodolfo D. Bravo
DOI:10.1080/00397910903533983
日期:2010.12.22
A convenient method for the synthesis of 1,2,4,5-tetrahydro-3,2-benzothiazepine 3,3-dioxides from 2-phenylethanesulfonamides and formaldehyde using Amberlyst resin as catalyst is described.
Sulfated Zirconia as an Efficient Catalyst for Sulfonylamidomethylation of Benzylsulfonamides and 2-Phenylethanesulfonamides: Effect of Catalyst Thermal Treatment
作者:Leandro D. Sasiambarrena、Leticia J. Mendez、Marco A. Ocsachoque、Alicia S. Cánepa、Rodolfo D. Bravo、M. Gloria González
DOI:10.1007/s10562-010-0389-x
日期:2010.9
The synthesis of 3,4-dihydro-1H-2,3-benzothiazine 2,2-dioxides and 1,2,4,5-tetrahydro-3,2-benzothiazepine 3,3-dioxides is studied using sulfated zirconia as catalyst. The sulfated zirconia calcined at 550 A degrees C achieved a high selectivity which is attributed to the formation of a tetragonal phase. In addition, the catalyst can be reused up to three times without loss of its catalytic activity.