Three‐Component Synthesis of Functionalized 5‐Oxo‐4,5‐dihydroindeno[1,2‐b]pyrans.

Abstract

2006 Pyran derivatives R 0340Three-Component Synthesis of Functionalized 5-Oxo-4,5-dihydroindeno[1,2-b]pyrans. -Vinylnitrilium cations, generated from acetylenedicarboxylates and isocyanides in the presence of indandione (I), undergo carbon-centered Michael--type addition with the conjugate base of the CH acid to form functionalized indenopyrans such as (IV) and (VII). -(YAVARI*, I.; SIROUSPOUR, M.; SOURI, S.; Mol. Diversity 10 (2006) 2, 265-270; Dep. Chem., Univ. Tarbiat Modarres, Tehran, Iran; Eng.) -C. Hettrich 50-150