Hydration of Various Sesquiterpene Hydrocarbons in the Presence of Synthetic Zeolites (iso-longifolene, thujopsene, and α-cedrene)

Reactions of Terpenes in the Presence of Synthetic Zeolites (Part 10)

Abstract

The hydration of iso-longifolene (1), thujopsene (2) and α-cedrene (3) with water in the presence of several synthetic zeolites was studied.
The following results were obtained.
The hydration of (1) with water in the presence of each synthetic zeolites afforded predominantly 2, 2, 7, 7-tetramethyl tricyclo [6.2.1.0^{1, 6}] undeca-5-en-4-on (4). With water in the presence of 2020 AH, widdrol (8) was obtained as the principal component from (2). With each synthetic zeolite, 2-cedranone (11) and 2-isocedranone (12) were obtained from (3) as the main products at more than 85 % of the hydration products.