Mepiquat

ChEBI: A quaternary ammonium ion has that has two methyl groups and a pentamethylene-1,5-diyl group attached to the nitrogen. Its salts are used as plant growth inhibitors.

Mepiquat, usually produced as the chloride variant, is commercially produced by quaternizing N-methylpiperidine with methylating agents such as methyl chloride or dimethyl sulphate. The synthesis begins with N-methylpiperidine, which undergoes alkylation using a methylating agent under controlled temperature and pressure, typically in a solvent like acetonitrile or ethanol. The reaction yields 1,1-dimethylpiperidinium chloride.

Gibberellin biosynthesis inhibitor

Plant Growth Regulator; Herbicide