Résumé/Abstract Herein we describe the access of novel pyrazolopyrrolizinones from commercial arylacetonitriles. The first step conducts to the corresponding aminoester which was first submitted to Clauson-Kaas procedure. Amidification and cyclisation afford then the first examples of the expected heterocycles. In order to improve the sequence and to obtain N-substituted isomers, 3-aryl-5-(pyrrolidin-1-ylcarbonyl)-4-(1H-pyrrol-1-yl)-1H-pyrazoles ( ...
