Cationic-lanthanide-complex-catalyzed reaction of 2-hydroxychalcones with naphthols: Facile synthesis of 2,8-dioxabicyclo[3.3.1]nonanes
作者： Yanan Zhu , Zhigang Yao , Fan Xu
DOI: 10.1016/J.TET.2018.06.038
关键词:
摘要: Abstract Cationic lanthanide complexes [Ln(CH3CN)9]3+[(AlCl4)3]3–·CH3CN served as efficient catalysts for the tandem Friedel–Crafts alkylation/ketalization reaction of 2-hydroxychalcones with naphthols/substituted phenols to produce diaryl-fused 2,8-dioxabicyclo[3.3.1]nonanes in moderate high yields. The catalytic efficiency cationic complex [Yb(CH3CN)9]3+[(AlCl4)3]3–·CH3CN compared that YbCl3 can be attributed increased Lewis acidity Yb species a result cation formation.
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