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Tao Wang, Xin-liang Chen, Li Chen, and Zhuang-ping Zhan. Atom-Economical Chemoselective Synthesis of 1,4-Diynes and Polysubstituted Furans/Pyrroles from Propargyl Alcohols and Terminal Alkynes. Org. Lett., 2011, 13 (13), pp 3324–3327
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http://dx.doi.org/10.1021/ol201054z