The selective monoamination of aryl dihalides by primary amines and polyamines in the presence of the Pd2(dba)3/dppf catalytic system and NaOt-Bu provides a convenient method for the synthesis of aminobenzenes substituted at the ortho, meta, or para position of the aryl ring by a halogen atom. Under these conditions the reaction of polyamine compounds having 1,2-diaminoethane or 1,3-diaminopropane moieties proceeds selectively leading to monoaryl-substituted derivatives of polyamines. Moreover, this is a remarkably efficient method to realize the arylation of a primary amine group of polyamines in the presence of a secondary one.
                                    在 Pd2(dba)3/dppf 催化体系和 NaOt-Bu 存在下,
伯胺和
多胺对芳基二卤化物的选择性单胺化反应为合成芳基环的正位、偏位或对位被卤原子取代的
氨基苯提供了一种简便的方法。在这些条件下,具有 1,2-二
氨基
乙烷或 1,3-二
氨基
丙烷分子的
多胺化合物会选择性地发生反应,生成
多胺的单芳基取代衍
生物。此外,这是一种非常有效的方法,可以在存在仲胺的情况下实现
多胺中
伯胺基团的芳基化。