Alkylation of (η6-Arene)Mn(CO)3 Cations with Organozinc Reagents
摘要:
Additions of allylic and benzylic zinc reagents to (eta (6)-arene)Mn(CO)(3) cations proceed in an anti fashion to give the C-6 allylic- and benzylic-substituted (eta (5)-cyclohexadienyl)Mn(CO)(3) neutral complexes, respectively. The reaction of less reactive primary organozinc reagents bearing an ester or a cyano group with the cations affords the a-alkylation products. Treatment of the organozinc reagent containing an acetoxy group with (eta (6)-benzene)Mn(CO)(3)(+) complex in THF results in alkylation of the cation at the C-2 position of THF.