Regio- and Stereo-selective Formation of Methylenecyclopropane Complexes from Allenes and Benzylidenepentacarbonyl Tungsten

Article abstract of DOI:10.1039/c39900000858

Benzylidenepentacarbonyl tungsten reacts with dimethylallene and phenylallene, respectively, by regiospecific and stereoselective transfer of the benzylidene group to the allene and co-ordination of the product methylenecyclopropane which can be cleaved almost quantitatively from the metal by Br(-); the structure of the 2-phenyl-3,3-dimethylmethylenecyclopropane complex is established by an X-ray structure analysis.