Abstract
The liquid-phase acetoxylation and acetoxylation/hydration of camphene ( 1) in homogeneous or heterogeneous systems catalyzed by dissolved or silica-supported heteropoly acid H 3PW 12O 40 (PW) in AcOH/H 2O solutions (0–10 vol.% H 2O) have been studied. Isobornyl acetate ( 2a) and isoborneol ( 3a) are the main reaction products which have been obtained with an almost 100% total selectivity. No oligomerization of camphene has been observed. PW shows a much higher catalytic activity than conventional acid catalysts such as H 2SO 4 and Amberlyst-15. It can be recovered without neutralization and reused.
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