ChemInform Abstract: Cascade Michael—Intramolecular Transesterification—Elimination Reaction of 3, 4‐Dihydro‐3‐nitrochromen‐2‐ones and β, γ‐Unsaturated α‐Oxo Esters: An Efficient Access to 2‐Pyrone Derivatives. Issue 6 (23rd January 2015)