3,4-Dimethoxyphenethylamine丨CAS 120-20-7

3,4-Dimethoxyphenethylamine (CAS 120-20-7), also known as homoveratrylamine, is an aromatic amine used as an intermediate in pharmaceuticals, agrochemicals, and fine chemical synthesis. In medicinal chemistry, it is applied in the preparation of bioactive compounds, including sympathomimetic agents, enzyme inhibitors, and central nervous system–active molecules. It also serves as a precursor in the synthesis of alkaloids, indole derivatives, and other heterocycles where the 3,4-dimethoxyphenyl group contributes to binding affinity and metabolic stability. In research, it is employed in structure–activity relationship (SAR) studies as a model phenethylamine derivative. Additionally, it is used in chemical biology and organic synthesis as a versatile scaffold for generating libraries of substituted amines and functionalized aromatic compounds.

The benefits of 3,4-dimethoxyphenethylamine derive from its balanced structure and reactivity. The phenethylamine backbone provides a flexible and biologically relevant scaffold for drug discovery, while the methoxy substituents enhance lipophilicity, modulate electronic properties, and improve metabolic stability. The primary amine allows for straightforward transformations such as acylation, alkylation, reductive amination, or coupling, making it adaptable for diverse synthetic pathways. Its dual functionalization-aromatic substitution and reactive amine-enables chemists to efficiently construct complex molecules with tailored pharmacological or chemical properties.