Ruthenium‐Catalyzed Asymmetric Transfer Hydrogenation of 1‐Aryl‐Substituted Dihydroisoquinolines: Access to Valuable Chiral 1‐Aryl‐Tetrahydroisoquinoline Scaffolds

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Give me an H! Give me another H! The first general and highly enantioselective Ru-catalyzed transfer hydrogenation of a wide range of 1-aryl-substituted 1,2,3,4-dihydroisoquinolines is described. This atom-economic reaction proceeds under mild conditions, allowing rapid access to the corresponding biologically relevant 1-aryl-tetrahydroisoquinoline derivatives, in high yields and enantioselectivities of up to 99 %.