In Gegenwart von [Ir(cod){(R)-segphos}]OTf (cod=1,5-Cyclooctadien, segphos=5,5′-Bis(diphenylphosphanyl)-4,4′-bi-1,3-benzodioxol, Tf=Trifluormethansulfonyl) reagieren Propargylchloride und primäre Benzylalkohole unter Wasserstoffaustausch. Dabei entstehen Allenyliridium-Aldehyd-Paare, die hoch enantioselektiv unter Bildung der Propargylierungsprodukte kombinieren (siehe Schema). Die Reaktion funktioniert auch, wenn Aldehyde eingesetzt werden. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.