Hydration of Various Monoterpene Hydrocarbons with Water or Chlorinated Acetic Acid in the Presence of Synthetic Zeolitest

Abstract

Hydration of dihydromyrcene [1], 3, 7-dimethyl-1-octene [2], and 5, 7-dimethyl-1, 6-octadiene [3] with water or dichloroacetic acid in the presence of several synthetic zeolites was investigated.
Hydration of [1] J with water in the presence of each synthetic zeolites and alkari ion [Al(OH)3] afforded selective formations of dihydromyrcenol [5] J and carvomenthol [6]. With HSZ-620 HOA zeolite, [6] was obtained in high selectivity (85%) for all products from 1]. While with HSZ-640 NAA zeolite, [5] was obtained as a main product (79.5%).
With dichloroacetic acid in the presence of each synthetic zeolites, [6] was obtained as the principal components from [2]. Hydration of [3] 2, 4-dimethyl-7-octen-2-ol [9] with high selectivity as the major product (98%). Studies on the Reaction of Terpenes in the Presence of Synthetic Zeolites. XV.