2021
DOI: 10.5155/eurjchem.12.2.187-191.2086 View full text |Buy / Rent full text
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Abstract: An analog of spirooxindole[pyrano-bis-2H-l-benzopyran] derivatives namely 5-bromospiro [indoline-3,7'-pyrano[3,2-c:5,6-c']dichromene]-2,6',8'-trione was synthesized via one-pot pseudo three-component reaction of one equivalent of 5-bromoisatin and two equivalents of 4-hydroxycoumarin using mandelic acid as a naturally occurring organo catalyst in aqueous ethanol under reflux conditions. The synthesized compound was characterized by FT-IR, 1H NMR, 13C NMR, and HRMS data. Crystal structure was determined by usin… Show more

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