e.g. Filippa Pettersson or Cancer Res. 75(6) , 1102-12, (2015) or 10.1002/anie.201600521
Yanovsky reaction of η 6-arene-η 5-cyclopentadienyliron cations with carbanions derived from ketones. Regiospecific attack ortho to electron withdrawing functions
RG Sutherland, RL Chowdhury, A Piórko…
Index: Sutherland, Ronald G.; Chowdhury, Ratan L.; Piorko, Adam; Lee, Choi Chuck Journal of the Chemical Society, Chemical Communications, 1985 , # 19 p. 1296 - 1297
η6-Arene-η5-cyclopentadienyliron salts containing electron withdrawing groups such as nitro, halogeno, benzoyl, cyano, and sulphonyl on the arene ring react with carbanions to give eletroneutral adducts of the Yanovsky type; these adducts give the corresponding substituted benzene on treatment with buffered cerium (IV) ammonium nitrate.