Abstract
An intramolecular C–H arylation of ferrocenyl ortho-bromophenyl sulfide and sulfoxide has been developed with a palladium/non-chiral monophosphine ligand. Under mild reaction conditions, a wide range of ferrocene cyclosulfide and ferrocene cyclosulfoxide were obtained in up to 90 % yield. Moreover, planar chiral ferrocene cyclosulfide with enantioselectivities (up to 45 % ee) was synthesized utilizing chiral phosphine ligands. Furthermore, the compound 4a and 6a can be used as novel chemosensors to detect Cu2+ ion.
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