87995-84-4Relevant articles and documents
1,3-Dipolar Cycloadditions, 90. Diphenylnitrilimine and Substituted Butadienes; Substituent Effects and Rate of Cycloaddition
Fliege, Werner,Huisgen, Rolf,Kolbeck, Winfried,Weberndoerfer, Volkmar
, p. 3438 - 3460 (2007/10/02)
1-Substitued butadienes accept diphenylnitrilimine (2) not at the 1,2- but rather at the 3,4-double bond; the regiospecific cycloaddition furnishes 5-substituted 1,3-diphenyl-2-pyrazolines.The relative addition rates, measured in competition experiments,