Convenient One-Pot Synthesis of L<sub>2</sub>Pd(0) Complexes for Cross-Coupling Catalysis
作者:Preston M. MacQueen、Ryan Holley、Subir Ghorai、Thomas J. Colacot
DOI:10.1021/acs.organomet.3c00059
日期:2023.9.25
A convenient one-pot synthesis of (tBu3P)2Pd(0) was successfully carried out by using various air-stable Pd(II) salts, such as Pd(cod)Cl2, Pd(nbd)Cl2, Pd(CH3CN)2Cl2, or Pd(PhCN)2Cl2, without the use of an external reducing agent. Using Pd(cod)Cl2 as the precursor, large-scale synthesis of (tBu3P)2Pd(0) was accomplished in excellent yield and purity. Another protocol was also developed for L2Pd(0) complexes
利用各种空气稳定的Pd(II)盐,如Pd(cod)Cl 2、Pd(nbd)Cl 2 ,成功地一锅法合成( t Bu 3 P) 2 Pd(0) , Pd(CH 3 CN) 2 Cl 2或Pd(PhCN) 2 Cl 2,不使用外部还原剂。以Pd(cod)Cl 2为前驱体,以优异的收率和纯度实现了( t Bu 3 P) 2 Pd(0)的大规模合成。还为 L 2开发了另一个协议Pd(0) 配合物通过原子经济的一锅法通过原位反应生成 LPd(R-烯丙基)Cl 配合物 (L = t Bu 3 P, Cy 3 P, (o-Tol) 3 P, CataXCium A, AmPhos ,QPhos:R = H,Me,Ph)与 1 当量 L 在碱存在下的产率范围为 74% 至 92%,尽管该过程可以进一步优化。这些方法优于文献报道的方法。