Efficient synthesis of indoles from 2-alkynylaniline derivatives in water using a recyclable copper catalyst system
2015
Song, Senchuan | Huang, Manna | Li, Wenjun | Zhu, Xinhai | Wan, Yiqian
A recyclable, effective CuI/PSP (polystyrene-supported pyrrole-2-carbohydrazide) catalyst system was established, with which a variety of N-(2-ethynylphenyl)-sulfonamides, even those with bulky substituents on the aromatic ring, have been smoothly cyclized to indoles in water with excellent yields.
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