Unusual Reactions Between Aromatic Carbon Supernucleophiles and 1,2-Diazabuta-1,3-dienes: Useful Routes to New Pyrazolone and Cinnoline Derivatives
作者:Luciano Forlani、Orazio A. Attanasi、Carla Boga、Lucia De Crescentini、Erminia Del Vecchio、Gianfranco Favi、Fabio Mantellini、Silvia Tozzi、Nicola Zanna
DOI:10.1002/ejoc.200800445
日期:2008.9
Reactions between 1,3,5-tris(dialkylamino)benzenes and 1,2-diazabuta-1,3-dienes produce semicarbazone derivatives through attack of the supernucleophile aromatic carbon atom at the terminal carbon atom of the heterodiene reagent. The strong activation of the aromatic ring due to the presence of the three amino groups in a symmetrical relationship promotes electrophilicaromaticsubstitution by the neutral