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Synlett 1996; 1996(1): 97-99
DOI: 10.1055/s-1996-5317
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Lithium Perchlorate Dispersed on Silica Gel, a Mild and Efficient Catalyst for Intramolecular Ene Reactions of Activated 1,6- and 1,7-Dienes

Tarun K. Sarkar* , Sandip K. Nandy, Binay K. Ghorai, Bireswar Mukherjee
  • *Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, INDIA
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Publication Date:
31 December 2000 (online)

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Lithium perchlorate has been investigated for its potential use as a Lewis acid catalyst in the intramolecular ene reactions. While the reactions are very sluggish in 5M lithium perchlorate/diethyl ether as such or in the presence of 10 mol% of camphorsulfonic acid and moderate enhancement of rates observed by both catalytic (15 mol%) and excess lithium perchlorate suspended in dichloromethane, lithium perchlorate dispersed on silica gel dramatically accelerates these reactions and provides a mild, effective and recyclable catalyst for intramolecular ene reactions of activated 1,6- and 1,7-dienes.

Lithium Perchlorate - Ene Reaction - Catalysis

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