Formetorex (INN), also known as formetamide or N-formylamphetamine, is a substituted amphetamine described as an anorectic which does not appear to have ever been marketed.

[2][3] Due to the simplicity of the Leuckart reaction, it is the most popular synthetic route employed for the illicit manufacture of amphetamines.

[2] For amphetamine synthesis, a mixture of phenylacetone and formamide (sometimes in the presence of formic acid) or ammonium formate, is heated until a condensation reaction results in the intermediate product, formetamide.

[2] In the second step, formetamide is hydrolysed using hydrochloric acid, and the reaction mixture is then basified, isolated, and steam distilled to produce the free base.

[2] The final step, the product is dissolved in an organic solvent and precipitated as the sulphate salt of amphetamine by adding sulfuric acid.