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.
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