Phase-transfer-catalyzed cyclization reaction of nucleophilic addition to electron-deficient 1,3-conjugated enynes for the synthesis of functionalized 4H-pyrans
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Jie Hu, Lei Liu, Shangdong Yang, Yong-Min Liang. "Phase-transfer-catalyzed cyclization reaction of nucleophilic addition to electron-deficient 1,3-conjugated enynes for the synthesis of functionalized 4H-pyrans." Organic and biomolecular chemistry 9.9 (2011) 3375