4-Trisubstituted pyrroles were synthesized from enolizable aliphatic aldehydes and primary aliphatic amines by using iodine as the dual Lewis acid/mild oxidant. In the presence of 3.0 equiv of TBHP, enolizable α,β-unsaturated aldehyde, for example, cocal reacted with aromatic primary amines to form C2-iodized N-arylpyrroles. An acetal-containing pyrrole was successfully prepared from 4-aminobutyraldehyde
A NOVEL PHOTOREARRANGEMENT OF 2,5-DIARYL-1,4-DITHIIN-1,1-DIOXIDE ACCOMPANIED BY EXTRUSION OF SULFUR DIOXIDE
作者:Keiji Kobayashi、Kiyoshi Mutai
DOI:10.1246/cl.1983.1461
日期:1983.9.5
Photolysis of the title compound afforded 2,5-diarylthiophene. The mechanism involving the valence isomerization to thioketone was supported by the photolysis in n-butylamine, which gave pyrrole derivatives.