Scholarlink

<p>The complexes [Pd(NHC)(cin)Cl] containing nitron-type N-heterocyclic carbene (NHC) ligands were synthesized. These ligands can acquire an anionic character due to the deprotonation of the NH-acidic arylamino group. The catalytic activity of the new complexes in the Suzuki—Miyaura reaction was evaluated. The η<sup>3</sup>-coordinated cinnamyl (cin) ligand, which is present in the complexes and acts as a reducing agent of Pd(<span>ii</span>) to Pd(0) in the presence of bases, promotes the rapid activation of the catalytic system. The complex with the 2,4-bis[2,6-diisopropylphenyl]-5-{[2,6-diisopropylphenyl]amino}-2,4-dihydro-3<i>H</i>-1,2,4-triazol-3-ylidene ligand showed a high efficiency in the catalysis of the cross-coupling of arylboronic acids with deactivated aryl chlorides and benzyl chlorides at 25 °C.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Palladium complexes with cinnamyl and ionizable N-heterocyclic carbene ligands in the catalysis of the Suzuki—Miyaura reaction at room temperature

  • 期刊论文

  • 发表日期：

    2025年3月1日

查看全文
  • A. Yu. Chernenko,
  • M. E. Minyaev,
  • V. M. Chernyshev

摘要

The complexes [Pd(NHC)(cin)Cl] containing nitron-type N-heterocyclic carbene (NHC) ligands were synthesized. These ligands can acquire an anionic character due to the deprotonation of the NH-acidic arylamino group. The catalytic activity of the new complexes in the Suzuki—Miyaura reaction was evaluated. The η3-coordinated cinnamyl (cin) ligand, which is present in the complexes and acts as a reducing agent of Pd(ii) to Pd(0) in the presence of bases, promotes the rapid activation of the catalytic system. The complex with the 2,4-bis[2,6-diisopropylphenyl]-5-{[2,6-diisopropylphenyl]amino}-2,4-dihydro-3H-1,2,4-triazol-3-ylidene ligand showed a high efficiency in the catalysis of the cross-coupling of arylboronic acids with deactivated aryl chlorides and benzyl chlorides at 25 °C.