Cross-metathesis between alpha-methylene-gamma-butyrolactone and olefins: a dramatic additive effect |
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Authors: | Moïse Joëlle Arseniyadis Stellios Cossy Janine |
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Institution: | Laboratoire de Chimie Organique, ESPCI, CNRS, 10 rue Vauquelin, F-75231 Paris Cedex 05, France. |
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Abstract: | reaction: see text] Olefin cross-metathesis between alpha-methylene-gamma-butyrolactone and terminal olefins is described. Moderate to excellent yields of alpha-alkylidene-gamma-butyrolactones were obtained with high E-stereoselectivity in the presence of low catalyst loading in refluxing CH2Cl2. In addition, the use of various additives was found to have a dramatic effect on the efficiency of the cross-metathesis (CM) process by circumventing the formation of the isomerized byproduct. |
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