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HClO4–SiO2-catalyzed synthesis of 12-aryl-12H-benzo[i][1,3]dioxolo[4,5-b]xanthene-6,11-diones and 10-aryl-6,7,8,10-tetrahydro-7,7-dimethyl-9H-[1,3]dioxolo[4,5-b]xanthen-9-ones

✍ Scribed by Liqiang Wu; Yanfang Wu; Fulin Yan; Lizhen Fang


Publisher
Springer Vienna
Year
2010
Tongue
English
Weight
213 KB
Volume
141
Category
Article
ISSN
0026-9247

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## Abstract The molecular structures of the title compounds 3 and 5 were investigated by NMR and X‐ray structural methods. The NMR results suggest two equivalent halves for both molecules. The X‐ray study shows an approximate mirror plane for 3 and an approximate twofold axis for a significant port