Abstract
AbstractPalladium/activated carbon (Pd/C) in the presence of 1,4‐bis(diphenylphosphino)butane is an efficient heterogeneous catalyst for cyclocarbonylation reactions of 2‐allyl phenols affording five‐, six‐, and seven‐membered ring lactones. Various examples of cyclocarbonylation are reported and the regioselectivity is compared with the homogeneous system. Both commercial Pd/C and Pd/C prepared from activated carbons obtained from vegetable and polymeric wastes are investigated. Copyright © 2002 John Wiley & Sons, Ltd.
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