Published in
Royal Society of Chemistry, RSC Advances, 18(11), p. 10610-10614, 2021
DOI: 10.1039/d1ra01004b
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Heteropolyacid ionic liquid heterogeneously catalyzed synthesis of isochromans via oxa-Pictet–Spengler cyclization in dimethyl carbonate
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Abstract
An efficient heterogeneous and green catalyst [HEMTH]H2[PMo12O40] was prepared to catalysis the oxa-Pictet–Spengler cyclization of arylethanols and aldehydes to afford isochromans with excellent yields using dimethyl carbonate as a green solvent.