Task: Text Categorization
Input (English): Primary ones can be made from phthalimide anions without danger of overalkylation, a convenient synthesis discovered by Siegmund Gabriel. They can also be made by reducing alkyl azides via either catalytic hydrogenation or treatment with lithium aluminum hydride. They can be converted to alkenes via the Hoffmann elimination, or acylated to form amides. Most of their chemistry is due to the reactivity of a lone pair, which makes them function as bases, and the simplest one is ammonia. FTP, name this class of compounds characterized by the presence of a nitrogen atom.
Output (English): Science