ChemInform Abstract: Mechanisms of Conjugate Additions of Hetero Nucleophiles. Part 3. Inner Workings of a Cinchona Alkaloid Catalyzed Oxa‐Michael Cyclization: Evidence for a Concerted Hydrogen‐Bond‐Network Mechanism. Issue 25 (3rd June 2013) - Hintermann, Lukas; Ackerstaff, Jens; Boeck, Florian