Syntheses and Plant Growth Retardant Activities of Trimethylammonium Compounds Containing a Terpenoid Moiety

Abstract

To obtain new plant growth retardants, about fifteen trimethylammonium compounds were prepared from terpenoid aldehydes or ketones and were bioassayed. N,N,N-Trimethyl-1-methyl-3-(2′,6′,6′-trimethy-2′-cycIohexen-1′-yl)-2-propenylammonium iodide (35), hitherto unknown, was the most effective growth retardant, the activity being far superior to that of AMO-1618.