Triethylammonium acetate-mediated domino-Knoevenagel-hetero-Diels-Alder reaction: Synthesis of some angular polyheterocycles

Article abstract of DOI:10.1007/s00706-012-0873-7

A solvent-cum catalyst, ionic liquid triethylammonium acetate-mediated one-pot procedure for the synthesis of some new angular benzopyrano[3,4-c] pyrano-fused pyrazoles, all of which incorporate a tertiary ring junction carbon, has been developed. The stereochemistry of the products has been confirmed by single-crystal X-ray diffraction data.