Author/Authors :
Deryabina، نويسنده , , Tatyana G. and Belskaia، نويسنده , , Natalia P. and Kodess، نويسنده , , Michail I. and Dehaen، نويسنده , , Wim and Toppet، نويسنده , , Suzanne and Bakulev، نويسنده , , Vasiliy A.، نويسنده ,
Abstract :
3-Methylsulfanyl-2-arylazo-3-(pyrrolidin-1-yl)acrylonitriles do not enter into [4+2]-cycloaddition reactions with maleimides to form the expected pyrrolo-pyridazines. Instead the formation of novel pyrrolo-pyridazines of type 4 takes place via a formal [3+2]-cycloaddition of initially formed pyrrolidine-derived azomethine ylides 7. The mechanism leading to the final product is discussed.
Keywords :
Diazadienes , azomethine ylides , Maleimides , Pyrrolizidines , cycloaddition
