A convenient synthesis of novel 2,3,4-trisubstituted 1,5-benzothiazepines bearing a sulfonyl pharmacophore
作者:Sanjay N. Karale、Umesh R. Pratap、Shital R. Mahalle、Ramrao A. Mane
DOI:10.1080/17415993.2011.594442
日期:2011.8
2-(Substituted phenyl)-3-[(methyl phenyl) sulfonyl] [(methyl sulfonyl) phenyl]-2,3-dihydro-1,5-benzothiazepines (5a-f) have been obtained in moderate yields by condensing 2-aminothiophenol with the chalcones 1-[(4'-methyl sulfonyl) phenyl]-2-[(4-methyl phenyl) sulfonyl]-prop-2-en-1-ones (4a-f) in toluene using trifluoroacetic acid as the catalyst. The benzothiazepines have also been synthesized by carrying out neat cyclocondensations of the chalcones supported on silica and 2-aminothiophenol at 80 degrees C. The precursors, chalcones (4a-f), were freshly prepared from alpha-(4'-methyl sulfonyl phenyl)-4-methyl sulfonyl acetophenone (3).[GRAPHICS].