Journal
GREEN CHEMISTRY
Volume 6, Issue 8, Pages 382-386Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b400393d
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Large amounts of waste may result from the neutralization of homogeneous acid catalysts following reaction. Here we present examples of in situ acid formation and self-neutralization, thus eliminating waste and offering advantages for product recovery. The formation of alpha-terpineol ( 2) from beta-pinene ( 1) is a reaction of commercial significance that is typically run with strong acid. We demonstrate that the reaction can be performed under more environmentally benign conditions using the in situ acid formation capabilities of two different green technologies: CO2 expanded liquids and reactions in hot water ( 200 degreesC). This work presents an example of the application of these methods to a reaction that has commercial significance and adds to our knowledge about the benefits and effects of co-solvents. The relative rates and product distributions achieved in each system are presented and discussed.
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