One-pot Synthesis of Functionalised Keteneimines by three Component reaction of Isocyanides, Dialkyl acetylenedicarboxylates, and 4-phenylaminocoumarin

Abstract

The reactive intermediate generated by the reaction of alkyl isocyanides and dialkyl acetylenedicarboxylates was trapped by 4-phenylaminocoumarin to produce dialkyl 2-cyclohexylamino-5-oxo-4 H,5 H-pyrano[3,2- c]chromene-3,4-dicarboxylates in good yields.