Abstract
The Hydration of longicyclene (1), longipinene (2), and ledene (3) with water or formic acid in the presence of several synthetic zeolites was investigated.
The hydration of (1) with water-formic acid (pH=1) in the presence of 2020 AH zeolite gave longicamphene hydrate (6) and longiborneol (8) as the main products.
The hydration of (2) with weter in the presence of HSZ-600 HOA zeolite and alkari ion [Al(OH)3 or Cu(OH)3] afforded predominantly longiverbenone (9).
The hydration of (3) with Ni(OH)2 in the presence of several synthetic zeolites gave 3-iso-propyl-6, 10-dimethyl bicyclo [5.3.0] deca-6-en-5-one (12) with high selectivity.
