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An Efficient Synthesis of 7,11-diarylspiro[5.5]undecane-1,9-dione by the Michael Condensation Under Ultrasound Irradiation in Aqueous and Organic Two Phase in the Presence of Phase-Transfer Catalyst

Journal: Letters in Organic Chemistry
Volume: 5 Issue: 7 Year: 2008 Page: 579-582
Author(s): Ji-Tai Li, Xin-Li Zhai, Zhi-Ping Lin, Xiao-Hui Zhang