Rm. Moriarty et al., MICHAEL ADDITION TO ALPHA,BETA-UNSATURATED ARENE RUTHENIUM(II) CYCLOPENTADIENE COMPLEXES - ENDO NUCLEOPHILIC-ADDITION, Chemical communications, (10), 1998, pp. 1155-1156
Certain carbon and sulfur nucleophiles add to the beta-terminus of the
styrene system in alpha,beta-unsaturated arene ruthenium(II) cyclopen
tadiene complexes, and unexpected endo addition occurs preferentially
in some cases.