116857-85-3Relevant academic research and scientific papers
1,3-Dipolar Cycloadditions of Aryl Nitrilimines to Electron-poor Alkenes
Adembri, Giorgio,Celli, Angela M.,Scotton, Mirella
, p. 249 - 251 (2007/10/02)
The 1,3-dipolar cycloadditions of aryl nitrilimines to 1,2-diacetylethylene gave along with 1,2-diaryl-4,5-diacetyl-4,5-dihydropyrazoles 5 and the corresponding dehydrogenated pyrazoles 6, the unexpected 1,3-diaryl-4-acetylpyrazoles 7.As for tetrasubstituted alkenes, whereas 1,2-diacetyl-1,2-dicarbethoxyethylene gave a stable cycloadduct 8, 1,2,3,4-tetraacetylethylene yielded a mixture of pyrazoles 6 and 7.
