... intermolecular hydrogenative aldol coupling of vinyl ketones catalyzed by [Rh(COD) 2 ]OTf/phosphonite to find high diastereoselectivity to 50:1 and enantioselectivity of 96%.(9) As for the intramolecular coupling, Lipshutz succeeded with ... b 2 h. ... 1. (a) Jang , H.-Y.; Krische , MJ ...