Practical Syntheses of<i>N</i>-Hexylcarbazol-2-yl- and -3-yl-boronic Acids, Their Cross-Coupled Products and a Derived Tris-cyclometalated (Pyridin-2-yl)carbazole Iridium(III) Complex
作者:Martin R. Bryce、Mustafa Tavasli、Sylvia Bettington、Andrei S. Batsanov、Andrew P. Monkman
DOI:10.1055/s-2005-865307
日期:——
The syntheses of N-hexylcarbazol-2-yl- and -3-yl-boron- ic acids (1 and 2) are described on a ca. 7 g scale, starting from com- mercially available 2,5-dibromonitrobenzene (4) and carbazole (11), respectively. Compounds 1 and 2 underwent efficient palladi- um-catalyzed cross-coupling reactions under Suzuki-Miyaura con- ditions to yield products 17, 18 and 20. Compound 18 reacted with IrCl3 to give
N-hexylcarbazol-2-yl-和-3-yl-boronic酸(1和2)的合成描述在ca。7 g 规模,分别从市售的 2,5-二溴硝基苯 (4) 和咔唑 (11) 开始。化合物 1 和 2 在 Suzuki-Miyaura 条件下进行了有效的钯催化交叉偶联反应,得到产物 17、18 和 20。化合物 18 与 IrCl3 反应得到三环金属化 (pyridin-2-yl)carbazole铱(III)络合物 21,其 X 射线晶体结构已被报道。