5-<i>Endo</i>-<i>D</i><i>ig</i> Electrophilic Cyclization of 1,4-Disubstituted But-3-yn-1-ones: Regiocontrolled Synthesis of 2,5-Disubstituted 3-Bromo- and 3-Iodofurans
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5-Endo-dig electrophilic cyclization of 1,4-diaryl but-3-yn-1-ones with N-bromosuccinimide or N-iodosuccinimide/acetone and iodine monochloride/CH2Cl2, at room temperature, in the absence of base, provides 3-halo-2,5-diarylfurans with excellent regiocontrol and high yields (81−94%).
创建时间：
2016-05-06
