Acid‐Catalyzed Intramolecular Imination / Nucleophilic Trapping of 4‐Aminobutanal Derivatives: One‐Pot Access to 2‐(Pyrazolyl)pyrrolidines. - Smolobochkin, Andrey V.; Rizbayeva, Tanzilya S.; Gazizov, Almir S.; Voronina, Julia K.; Dobrynin, Alexey B.; Gildebrant, Anastasiya V.; Strelnik, Anna G.; Sazykin, Ivan S.; Burilov, Alexander R.; Pudovik, Michail A.; Sazykina, Marina A. (European Journal of Organic Chemistry, 2019)