Pyrrolidine, also known as tetrahydropyrrole, is a saturated five-membered heterocyclic ring, which is miscible with water. Pyrrolidine exists in many alkaloids and drug molecules, such as kappa opioids, antagonists of dopamine D4 receptors, and HIV reverse transcriptase inhibitors.
Among the heterocyclic compounds, pyridopyrazine compounds are widely used as intermediates in the preparation of advanced pharmaceutical materials with biological activity, and are the scaffolding materials that have been widely concerned by academia and industry in recent years. There are many pyridopyrazine derivatives on the market for the treatment of various pharmacological diseases.