名称:
Synthesis of 1-Aryl-3-phenylsulfonyl-1,2,4-triazoles from 1,5-Diaryl-3-phenylsulfonylformazans
摘要:
1,5-Diaryl-3-phenylsulfonylformazans (5) were prepared through phenylsulfonylmethanal arylhydrazones (4) starting from methyl phenyl sulfone. Treatment of these formazans (5) with formalin and potassium hydrogen sulfate in DMF gave 1-aryl-3-phenylsulfonyl-1,2,4-triazoles (9) instead of the expected 1,5-diaryl-3-phenylsulfonylverdazyls (8).