A compound of formula (I), or a pharmaceutically acceptable salt or ester thereof, wherein the symbols have meaning as defined, which are antagonists of CCR-1 and which find use pharmaceutically for treatment of diseases and conditions in which CCR-1 is implicated, e.g. inflammatory diseases.
An efficient enantioselective palladium-catalyzed trifluoromethylated allylic alkylation of N-substituted glycine ethyl esters using α-(trifluoromethyl)alkenyl acetates as trifluoromethyl-containing allyl precursors is established. A series of optically active glycine ethyl ester derivatives containing a trifluoromethylated allyl substituent are readily synthesized in good yields with superior enantioselectivities