Amines are organic compounds containing nitrogen atoms bonded to carbon atoms. They are derived from ammonia (NH₃) by replacing one or more hydrogen atoms with organic substituents. Depending on the number of attached alkyl or aryl groups, amines are classified as primary (one group), secondary (two groups), or tertiary (three groups). Common methods for amine synthesis include nucleophilic substitution, reductive amination, and Gabriel synthesis. Amines play crucial roles in biological processes, pharmaceuticals, and the synthesis of various organic compounds, making them essential components in organic chemistry.