Enantioselective iridium-catalyzed hydrogenation of β,γ-unsaturated carboxylic acids: an efficient approach to chiral 4-alkyl-4-aryl butanoic acids.

Chiral acids: a highly enantioselective iridium-catalyzed hydrogenation of β,γ-unsaturated carboxylic acids is developed for the preparation of chiral 4-alkyl-4-aryl butanoic acids.