Sleeping beauty: A dormant catalyst, 1, can be activated in situ by various acids (HA) to form complexes 2 of high activity in olefin metathesis. After the reaction and when subjected to silica gel chromatography, these catalysts are readily transformed back into 1. This system shows a high degree of tunability and excellent applicability in model metathesis reactions. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z701302_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
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Gawin et al. (2007) studied this question.