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<p>The Pechmann condensation remains one of the most direct routes to coumarin frameworks; however, its efficiency is often compromised by harsh Brønsted acids or solvent effects. An expeditious and efficient protocol for Pechmann condensation has been described. The synthesis of coumarin using phenols and β-ketoesters with catalytic amount of zinc triflate under solvent-free conditions afforded good to excellent yields of the coumarins. The described protocol is operationally simple and ecofriendly.</p>

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Zinc triflate catalyzed solvent-free synthesis of coumarins

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年8月5日

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  • S. S. Kale,
  • N. K. Dhurve,
  • Shaikh Tanveer,
  • Mohammad Ali,
  • Abhijit B. Ingle,
  • Nilesh S. Shelke,
  • Rohinee R. Dharamkar,
  • Hemant S. Chandak

摘要

The Pechmann condensation remains one of the most direct routes to coumarin frameworks; however, its efficiency is often compromised by harsh Brønsted acids or solvent effects. An expeditious and efficient protocol for Pechmann condensation has been described. The synthesis of coumarin using phenols and β-ketoesters with catalytic amount of zinc triflate under solvent-free conditions afforded good to excellent yields of the coumarins. The described protocol is operationally simple and ecofriendly.