Microwave assisted synthesis of indole-annulated dihydropyrano[3,4-c] chromene derivatives via hetero-Diels-Alder reaction

Article abstract of DOI:10.1016/j.tetlet.2011.06.052

An efficient two-step synthesis of indole-annulated dihydropyrano[3,4-c] chromene derivatives is achieved via Knoevenagel condensation of O-propargylated salicylaldehyde derivatives with indolin-2-ones followed by a microwave-assisted intramolecular-heter