NaY Zeolite Functionalized by Sulfamic Acid/Cu(OAc)2 as a Novel and Reusable Heterogeneous Hybrid Catalyst in Efficient Synthesis of Bis,Tris, and Tetrakis(indolyl)methanes, 3,4‐Dihydropyrimidin‐2(1H)‐ones,and 2‐Aryl‐1H‐benzothiazoles |
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| Abstract: | An efficient acid‐catalyzed synthesis of some bis, tris, and tetrakis(indolyl)methanes, 3,4‐dihydropyrimidin‐2(1H )‐ones, and 2‐aryl‐1H ‐benzothiazoles is reported using NaY zeolite functionalized by sulfamic acid/Cu(OAc )2 (NaY zeolite‐NHSO3H /Cu(OAc )2) in excellent yield. The heterogeneous catalyst has a simple work‐up procedure and could be recycled and reused for six reaction cycles. |
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| Keywords: | Bis(indolyl)methane Tris(indolyl)methane Tetrakis(indolyl)methane Heterogeneous catalyst 3 4‐Dihydropyrimidin‐2(1H)‐ones 2‐Aryl‐1H‐benzothiazoles NaY zeolite functionalized by sulfamic acid/Cu(OAc)2
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