bipyridine or terpyridine subunits, in the presence of catalytic amounts of Pdo(PPh3)4 to yield, the new homo- and heteroditopic ethynyl bridge ligands 2a, 4a, 7a and 8. Self coupling of the ethynyl substituted bipyridine species in the presence of CuCl/TMEDA/O2, yield the symmetric diethynyl bridge ligands 2b, 4b and 7b.
乙炔基取代的联
吡啶螯合物与
溴或
三氟甲磺酸酯官能化联
吡啶或三联
吡啶亚基在催化量的Pd o(PPh 3)4存在下反应,生成新的均位和异位
乙炔基桥
配体2a,4a,7a和8。在CuCl / TME
DA / O 2存在下
乙炔基取代联
吡啶的自偶联产生对称的二
乙炔基桥
配体2b,4b和7b。