Novel behaviour of dialkylamino-substituted propargylic alcohols in reactions with arene ruthenium(II) complexes

Abstract

Reaction of arene ruthenium(II) derivatives (C₆Me₄R₂)RuCl₂(L)(R = H, Me; L = PMe₃, PPh₃) with the prop-2-ynylic alcohol derivative HCC–C(H)(OH)(C₆H₄-p-NMe₂) in dichloromethane results in the formation of new oxametallacyclic ruthenium(II) complexes {(C₆Me₄R₂)Ru[CHC(C₆H₄-p-NMe₂)CHO](L)} PF₆via an unprecedented 1,2-migration of the dimethylaminophenyl substituent; the structure of one compound (R = H; L = PPh₃) is determined by an X-ray crystal structure analysis.