Abstract
Several copper-exchanged and CuCl 2 -supported solids, together with copper oxide, have been tested as catalysts in the benchmark cyclopropanation reaction of styrene with ethyl diazoacetate. The catalytic activity does not dependent on the amount of copper but on the structure and pretreatment of the catalyst. The trans/cis selectivity also depends on the nature of the solid and with K10-montmorillonite the cis-cyclopropane is predominantly obtained, so that the selectivity is reversed with regard to that observed with copper homogeneous catalysts. The use of several olefins confirms this tendency to reverse the selectivity obtained in solution and the electrophilic character of the reaction. The effect of the reaction conditions and the influence of the solvent are also analyzed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
