Ultrasound Promoted Green and Facile One-Pot Multicomponent Synthesis of 3,4-dihydropyrano[<i>c</i>]chromene Derivatives

<table>Synthetic route for the synthesis of 3,4-dihydropyrano[<i>c</i>]chromene derivatives <b>4a</b>–<b>4p</b>. Reagents and conditions: Sodium acetate (30 mol%), H<sub>2</sub>O, Ultrasound irradiation, and room temperature. </table>

Journal of Chemistry

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Scheme 1

Scheme 1: Ultrasound Promoted Green and Facile One-Pot Multicomponent Synthesis of 3,4-dihydropyrano[<i>c</i>]chromene Derivatives 

Journal of Chemistry

Ultrasound Promoted Green and Facile One-Pot Multicomponent Synthesis of 3,4-dihydropyrano[c]chromene Derivatives

Scheme 1