Calix[n]arene sulfonic acids bearing pendant aliphatic chains as recyclable surfactant-type Brønsted acid catalysts for allylic alkylation with allyl alcohols in water
- 1 January 2008
- journal article
- Published by Royal Society of Chemistry (RSC) in Green Chemistry
- Vol. 10 (6), 635-640
- https://doi.org/10.1039/b719278a
Abstract
Calix[n]arene sulfonic acids bearing pendant aliphatic chains were developed as surfactant-type Brønsted acid catalysts for allylic alkylation with allyl alcohols in water. The allylic alkylation products of aromatic compounds were obtained in 60–94% yields. The water-solution of the surfactant-type catalyst was recovered by means of simple extraction of water-insoluble products and centrifiguation, which can be reused in the next cycle directly. After recycling seven times, the catalytic activity for the aqueous reaction still remained at a high level (92–96% yields).Keywords
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