N-Methoxy-N-methyltetrahydropyran-4-carboxamide is a Weinreb amide used as a reagent in organic synthesis. It facilitates controlled nucleophilic addition of organometallic reagents (such as Grignard or organolithium compounds) to its carbonyl group, enabling selective synthesis of ketones without over-addition to tertiary alcohols. This stability and reactivity make it valuable in pharmaceutical and fine chemical manufacturing for constructing complex molecules. It is commonly employed in multi-step synthesis of natural products and active pharmaceutical ingredients (APIs).