Efficient P,O chelate palladium(II)/AgNO3 cocatalyzed homocoupling of aromatic terminal alkynes in aqueous media under ambient atmosphere |
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| Authors: | Bo Chen Yongju Wen Xiuli Shen Xiuling Zhou Meiyun Lv |
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| Institution: | Institute of Coordination Catalysis, College of Chemistry and Bio-engineering, Yichun University, Yichun, People's Republic of China |
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| Abstract: | A new and efficient protocol for the P, O chelate Pd(II)/AgNO3 cocatalyzed oxidative homocoupling reaction of aromatic terminal alkynes in the synthesis of symmetrical 1,4-disubstituted-1,3-diynes was described in aqueous media under ambient atmosphere. The results showed that both NEt3 and THF/H2O (in 4:1 proportion) played crucial roles in the reaction. In contrast, this protocol employs a low palladium(II) complex loading and AgNO3 as cocatalyst to obtain the homocoupled products in moderate to good yields. |
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| Keywords: | Aromatic terminal alkynes P O chelate Pd(II) complex/AgNO3 cocatalyst homocoupling reaction 1 4-disubstituted-1 3-diynes |
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