
Tetrahedron Letters p. 507 - 510 (1990)
Update date:2022-08-11
Topics:
Kauffmann, Thomas
Laarmann, Barbara
Menges, Detlef
Voss, Karl-Uwe
Wingbermuehle, Dorothea
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.
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