Synthesis of a Novel Potential Tridentate Anthracene Ligand, 1,8-Bis(dimethylamino)-9-bromoanthracene, and Its Application as Chelate Ligand for Synthesis of the Corresponding Boron and Palladium Compounds
作者:Makoto Yamashita、Kumiko Kamura、Yohsuke Yamamoto、Kin-ya Akiba
DOI:10.1002/1521-3765(20020703)8:13<2976::aid-chem2976>3.0.co;2-g
日期:2002.7.3
degrees C. 1,8-Bis(dimethylamino)-9-bromoanthracene itself can be a versatile ligand for transition metal compounds. In fact, direct palladation of the bromide took place by the reaction with [Pd2(dba)3].CHCl3 in THF to give the 9-palladated product. X-ray crystallographic analysis of the Pd compound showed that the square planar palladium atom was coordinated in a symmetrical fashion by both NMe2 groups
合成了一种新型的潜在的三齿配体1,8-双(二甲基氨基)-9-溴蒽。关键步骤如下:1)通过改良的布赫瓦尔德方法对1,8-二溴9-甲氧基蒽进行二甲基氨基化,得到1,8-双(二甲基氨基)-9-甲氧基蒽,以及2)LDBB还原甲氧基(二叔丁基联苯基锂),然后用BrCF2CF2Br处理。可以通过用一当量的nBuLi处理溴化物来生成相应的1,8-双(二甲基氨基)-9-硫代蒽,应该是有用的通用三齿配体。硫代蒽与B-氯硼烷衍生物反应生成三种9-硼基衍生物。尽管我们最近报道了1,8-二甲氧基-9-B-邻苯二酚硼蒽并蒽的晶体结构是对称化合物,但两个OB距离几乎相同(2。379(2)和2.441(2)A)中,新制备的1,8-双(二甲基氨基)-9-硼蒽衍生物显然具有不对称结构,只有一个NMe2基团与中心硼原子配位。然而,根据1 H NMR测量,发现非对称结构和对称结构之间的能量差非常小,其中在芳族区