phosphine ligands, a Pd-catalyzed asymmetric double hydroxycarbonylation of terminal alkynes to chiralsuccinicacids was achieved in a one-pot manner. The alkyne carbonylation was dictated by the achiral monophosphine to afford branched acrylic acids, while the resulting intermediates further underwent Pd/chiral bisphosphine-catalyzed enantioselective hydroxycarbonylation.
The present invention relates to compounds of formula (I): or pharmaceutically acceptable salts or mixture thereof that inhibit serine protease activity, particularly the activity of hepatitis C virus NS3-NS4A protease.