ANWENDUNG NICHTSTABILISIERTER EISEN(II)-ALKYLE ALS HOCHSELEKTIVE NUCLEOPHILE ALKYLIERUNGSREAGENZIEN

Article abstract of DOI:10.1016/0040-4039(90)87020-Z

Nonstabilized Fe(II) alkyls (RFeCl, R2Fe, R3FeM, R4FeM2; R=Me, n-Bu, M=Li, MgBr) are readily accessible in solution (THF, Et2O, CH2Cl2) by reaction of MeLi, MeMgBr, n-BuLi or n-BuMgBr, respectively, with FeCl2 at -78 to -50 deg C.The needed FeCl2 can be made by in-situ-reduction with RLi or RMgBr.For checking the transmetallation process the "β-bromostyrene-ketone-test" is especially favorable in case of the methyl derivatives.The prepared Fe compounds are alkylating reagents of high selectivity.