title: Synthesis of 6a,6b,13,13a-tetrahydro-6H-5-oxa-12a-azadibenzo[a,g]fluorene derivatives via cycloaddition reactions of isoquinolinium salts with 3-nitrochromenes.
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. 1H NMR data and single crystal structures confirm the production and isolation of a single stereoisomer.
authors.affiliation: College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, 225002, People's Republic of China.
authors.forename: Jun
authors.initials: J
authors.lastname: Fang
authors.forename: Chao-Guo
authors.initials: CG
authors.lastname: Yan
mesh_terms: D001578:Benzopyrans / Q000737:chemistry*; D061565:Cycloaddition Reaction; D005449:Fluorenes / Q000138:chemical synthesis* / Q000737:chemistry*; D006576:Heterocyclic Compounds, 4 or More Rings / Q000138:chemical synthesis* / Q000737:chemistry*; D011806:Quinolinium Compounds / Q000737:chemistry*; D012492:Salts / Q000737:chemistry*
chemical_list: D001578:Benzopyrans; D005449:Fluorenes; D006576:Heterocyclic Compounds, 4 or More Rings; D011806:Quinolinium Compounds; D012492:Salts; C041509:fluorene