Microwave‐Assisted One‐Pot Synthesis of Tetrahydro‐β‐Carbolines by Fe(II)‐Catalyst: Utilizing Methanol as Methylene Synthon

The synthesis of tetrahydro‐β‐carbolines (THβCs) framework is a fundamental aspect of medicinal chemistry due to their significant pharmacological applications. Herein, we developed a microwave‐assisted novel approach for the synthesis of THβC scaffolds utilizing ferrous(II) chloride as an earth abundant metal catalyst and methanol used as valuable methylene source. This methodology demonstrates excellent functional group tolerance and provides N 2‐substituted THβCs in good to excellent yields. Overall, this study highlights a sustainable and practical strategy for the synthesis of biologically important THβCs, thereby offering promising prospects in the drug discovery and development.