ChemInform Abstract: Selective Synthesis of Cyano‐Functionalized 2‐Aryl‐4H‐chromenes and 2‐Amino‐4H‐chromene‐3‐carbonitriles by Catalyst‐Tuned Reactions of 2‐Hydroxychalcones with 2‐Substituted Acetonitriles. Issue 21 (2nd May 2013)