Synthesis and use of 3,3'-bimorpholine derivatives in asymmetric Michael addition and intramolecular aldol reactionSulzer-Mosse, Sarah; Laars, Marju; Kriis, Kadri; Kanger, Tõnis; Alexakis, AlexandreSynthesis2007 / 11, p. 1729-1732 https://www.thieme-connect.com/products/ejournals/abstract/10.1055/s-2007-965966