硅胶负载的铜（II）催化有机硼酸和咪唑的Ar-N偶联反应

本文报道了有机无机杂化材料固载的铜（II）催化有机硼酸和咪唑的Ar-N偶联。在3-（2-氨乙氨）丙基功能化的硅胶固载的铜（II）催化下，有机硼酸和咪唑于甲醇中的Ar-N偶联生成高产率相应的偶联产物。而且硅胶负载的铜（II）催化剂经简单过滤，可循环使用5次不降低活性。     

Silica-supported Copper（Ⅱ） Catalyzed Coupling of Arylboronic Acids with Imidazoles

Immobilized copper（Ⅱ） in organic-inorganic hybrid materials catalyzed Ar-N coupling of arylboronic acids with imidazoles has been developed. Arylboronic acids reacted with imidazoles smoothly in the presence of a 3-（2-aminoethylamino）propyl functionalized silica gel immobilized copper（Ⅱ） catalyst （10 mol%） in methanol without any additives and bases. The reactions generated the corresponding cross-coupling products in good yields. Furthermore, silica-supported copper can be recovered and recycled by a simple filtration procedure and used for five consecutive trials without decreases in activity.