How is (2S)-1-Methyl-2-(1-pyrrolidinylmethyl)pyrrolidine (CAS: 76411-80-8) typically synthesized?

(2S)-1-Methyl-2-(1-pyrrolidinylmethyl)pyrrolidine can be synthesized via a series of reactions starting from pyrrolidine and methyl halide. Commonly, pyrrolidine is reacted with methyl iodide in the presence of a base such as potassium carbonate to form the desired product. The reaction mixture is then purified through distillation. The yield of the product is typically around 70-80%, and the reaction can be conducted under mild conditions to ensure high product selectivity.