Jun Fang, Chaoguo Yan
Oct 22, 2013
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Journal
Molecular Diversity
Abstract
An efficient and diastereoselective synthetic procedure for functionalized 6a,6b,13,13a-tetrahydro-6H-5-oxa-12a-azadibenzo[a,g]fluorene derivatives was successfully developed by the cycloaddition reaction of isoquinolinium salts and 3-nitrochromenes with triethylamine as base in ethanol at room temperature. $${}^{1}\hbox {H}$$1H NMR data and single crystal structures confirm the production and isolation of a single stereoisomer.Graphic Abstract