Metal-catalyzed [3+2] cycloadditions of azomethine imines

[Figure not available: see fulltext.] In the last decade, metal-catalyzed [3+2] cycloadditions of azomethine imines have emerged as a regioselective and stereoselective method for the synthesis of pyrazolidines and pyrazolines. A considerable number of asymmetric reactions proved the viability of metalcatalyzed [3+2] cycloadditions of azomethine imines for the synthesis of nonracemic cycloadducts. This review covers around 50 examples of title reactions that have been published since 2002.