Effective Pd-Nanoparticle (PdNP)-Catalyzed Negishi Coupling Involving Alkylzinc Reagents at Room Temperature
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- 作者：Jing Liu ; Yi Deng ; Haibo Wang ; Hua Zhang ; Ganxiang Yu ; Bingbin Wu ; Heng Zhang ; Qiang Li ; Todd B. Marder ; Zhen Yang ; Aiwen Lei
- 刊名：Organic Letters
- 出版年：2008
- 出版时间：July 3, 2008
- 年：2008
- 卷：10
- 期：13
- 页码：2661 - 2664
- 全文大小：266K
- 年卷期：v.10,no.13(July 3, 2008)
- ISSN：1523-7052
文摘
Pd(OAc)2 is an efficient catalyst precursor for Negishi coupling in the presence of Bu4NBr. Secondary and primary alkylzinc reagents with β-H and arylzinc reagents all reacted with aryl iodides at temperatures as low as −20 °C, giving moderate to good yields. One example of coupling between alkynylzinc reagents and aryl iodides was tested and the yield was good. Preliminary kinetic studies indicated that the process involved PdNPs as the active catalytic species.