846-73-1Relevant articles and documents
Microwave mediated facile one-pot synthesis of polyarylpyrroles from but-2-ene- and but-2-yne-1,4-diones
Rao, H. Surya Prakash,Jothilingam,Scheeren, Hans W.
, p. 1625 - 1630 (2007/10/03)
Several pyrrole derivates with multiple aryl substituents were prepared conveniently in a one pot-reaction from but-2-ene-1,4-diones and but-2-yne-1,4-diones via hydrogenation of the carbon-carbon double bond/triple bond followed by amination-cyclization. The reaction could be performed with ammonium formate or alkyl/arylammonium formates under Pd/C in polyethylene glycol-200 (PEG-200) under microwave irradiation. Using this procedure, different aryl-substituted pyrroles were prepared. Furthermore, studies on microwave vs thermal conditions indicate faster heating under microwave conditions was responsible for rate enhancement.
One-pot synthesis of pyrrole derivatives from (E)-1,4-diaryl-2-butene-1,4-diones
Surya Prakash Rao,Jothilingam
, p. 6595 - 6597 (2007/10/03)
2,5-Di- and 1,2,5-trisubstituted pyrrole derivatives can be prepared conveniently from (E)-1,4-diaryl-2-butene-1,4-diones in a one-pot operation through domino-pathways via palladium-assisted transfer hydrogenation followed by a Paal-Knorr reaction using ammonium formate and its analogs.
A NOVEL PHOTOREARRANGEMENT OF 2,5-DIARYL-1,4-DITHIIN-1,1-DIOXIDE ACCOMPANIED BY EXTRUSION OF SULFUR DIOXIDE
Kobayashi, Keiji,Mutai, Kiyoshi
, p. 1461 - 1462 (2007/10/02)
Photolysis of the title compound afforded 2,5-diarylthiophene.The mechanism involving the valence isomerization to the thioketone was supported by the photolysis in n-butylamine, which gave pyrrole derivatives.