- Synthesis of cyclopentanoids via enyne cycloaddition reaction using methylmanganese carbonyl complex
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Methylmanganese pentacarbonyl-mediated transformation of enynes to cyclopropanated bicyclic compounds and cyclopentanes bearing an exocyclic double bond has been carried out. Control of the product distribution can be achieved by changing reaction conditi
- Lee, Joo Eun,Hong, Soon Hyeok,Chung, Young Keun
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p. 1781 - 1784
(2007/10/03)
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- Cyclization Reactions of Molybdenum and Chromium Carbene Complexes with 1,6- and 1,7-Enynes: Effect of Tether Length and Composition
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It has been observed that the reaction of 1,6- and 1,7-enynes with pentacarbonyl(butylmethoxycarbene)molybdenum(0) (18) produces vinylcyclopropanes in good to excellent yield.A systematic investigation into the factors which govern the success of these cyclizations has been performed.Chromium carbene complexes also lead to the formation of vinylcyclopropanes but in significantly lower yields.When the pathway to vinylcyclopropanes is not followed, a number of other distinct types of products are obtained.The pathways leading to these various products are discussed and compared.
- Harvey, Daniel F.,Lund, Kevin P.,Neil, David A.
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p. 8424 - 8434
(2007/10/02)
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- REACTIONS OF ENYNES WITH ADSORBED METAL-CARBENES
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Adsorbed on silica-gel or on other adsorbants (MgSO4, Na2SO4, or Na2CO3), but not in homogeneous solution, pentacarbonyl(methoxyethylidene)chromium combines with simple enynes to give bicyclohexanes.The method's usefulness is illustrated by the synthesis of a variaty of previously unknown structures from simple hydrocarbons, ethers, and amines.
- Katz, Thomas J.,Yang, Ginger Xu-Quiang
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p. 5895 - 5898
(2007/10/02)
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