ChemInform Abstract: Reaction Between Dialkyl Acetylenedicarboxylates and Six‐Membered 1,3‐Diketones in the Presence of Trialkylamines: A Convenient Synthesis of Alkyl 2,5‐Dioxo‐5,6,7,8‐tetrahydro‐2H‐chromene‐4‐carboxylates.

Abstract

Alkyl 2,5-Dioxo-5,6,7,8-tetrahydro-2H-chromene-4-carboxylates. -With a view to their potential value as synthetic intermediates the compounds (III) are prepared. -(NASIRI*, F.; POURDAVAIE, K.; YOSEFDAD, S.; ATASHKAR, B.; Mendeleev Commun. 17 (2007) 6, 352-353; Dep. Chem., Fac. Sci., Kurdistan Univ., Sanandaj, Iran; Eng.) -K. Schneider 30-137