ChemInform Abstract: Diastereoselective Cyclopropanation of Simple Alkenes by 2-Phenyl- and 2-Ferrocenylalkenyl Fischer Carbene Complexes of Chromium.
Abstract
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ChemInform Abstract
For the first time, it is demonstrated that alkoxy-stabilized vinylcarbene complexes of chromium containing a phenyl or the strongly electron-donating ferrocenyl group attached in a conjugated fashion, are able to cyclopropanate electron neutral alkenes in an intermolecular manner. The reaction occurs with high diastereoselectivity. From the initial adducts the ferrocenyl group can be removed by oxidative cleavage of the vinyl portion with ozone.
