Abstract
Hydration was studied for myrcene (1) or isoprene (2) with halogenated acetic acid under following conditions ; the equimolar mixtures of (1) or (2) and halogenated acetic acid (monochloro-, dichloro- or trichloroacetic acid) was stirred in flask with or without dichloroethane, benzene, n-hexane or water.
(1) yielded the following six alcohols : linallol (3), myrcenol (5), 3, 7-dimethyl-1, 3-octadiene-7-ol (6), β-terpineol (7), α-terpineol (8), geraniol (9); two unidentified compounds were also found in small amounts.
Conversion is 81% under the best conditions. The content of (5) plus (9) in the hydration products is 51% under the best conditions.
(2) yielded the following three alcohols : (7), (8), (9); two unidentified compounds were also found in small amounts.
(8) is the main product (68%) from the monoterpene alcohols when the hydration is carried out in the presence of a solvent.
When dichloroacetic acid was used as a telogen in the absence of a solvent, the content of (9) in the monoterpene alcohols was 53%.
