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Lewis Acid Catalyzed Cascade Reactions of 1,6‐Diynes and 1,6‐Enynes with Vinylidenecyclopropanes
Authors:Liang‐Feng Yao  Min Shi Prof Dr
Institution:State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai, 200032 (China), Fax: (+86)?21‐64166128
Abstract:Cascade reactions : Lewis acid catalyzed cascade reactions of 1,6‐diynes and 1,6‐enynes with arylvinylidenecyclopropanes produce polycyclic compounds and isopropylidene‐3,3‐diarylcyclobut‐1‐enylmethyl derivatives (see scheme) in good to high yields along with a PtCl2‐catalyzed cyclization and a Cu(OAc)2 ? H2O‐catalyzed Eglinton coupling reaction.
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Keywords:cyclization  cyclopropanes  Friedel–  Crafts reaction  Lewis acids  platinum
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