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Synlett 1995; 1995(11): 1155-1157
DOI: 10.1055/s-1995-5222
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Acid Catalyzed Ionic Diels-Alder Reactions in Concentrated Solutions of Lithium Perchlorate in Diethyl Ether

Paul A. Grieco* , Jon L. Collins, Scott T. Handy
  • *Ernest E. Campaigne and Marvin Carmack Laboratory of Organic Chemistry, Department of Chemistry, Indiana University, Bloomington, Indiana 47405, USA
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Publication Date:
31 December 2000 (online)

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Ketals and orthoesters of unsaturated ketones and esters, respectively, undergo facile, ambient temperature inter- and intramolecular ionic Diels-Alder reactions in 4.0-5.0 M lithium perchlorate-diethyl ether containing a few mol % of camphorsulfonic acid.

ketals of unsaturated ketones - orthoesters of unsaturated esters - ionic Diels-Alder reaction - 5.0 M lithium perchlorate-diethyl ether