Abstract The nucleophilic addition of methanol to two nitrile-functionalized triazamacrocyclic derivatives 1,4,7-tris(cyanomethyl)-1,4,7-triazacyclononane (L1) and 1,4,7-tris(cyanoethyl)-1,4,7-triazacyclononane (L2) were systematically studied under the mediation of various Cd2+ salts with different counter anions. When L1 was reacted with Cd(OAc)2·2H2O in refluxing methanol for 4 h at a ratio of 1:1
                                    摘要将
甲醇亲核加成到两个腈官能化的三氮杂大环衍
生物1,4,7-三(
氰甲基)-
1,4,7-三氮杂环壬烷(L1)和1,4,7-三(
氰乙基)-1,4,在具有不同抗衡阴离子的各种Cd2 +盐的介导下,系统地研究了7-三氮杂
环壬烷(
L2)。当L1与Cd(OAc)2·2H2O在回流
甲醇中以1:1的比例反应4小时时,L1的三个侧链CH2CN基团完全溶剂化,然后形成三棱柱状络合物[Cd(L3)] 2 +与所得的亚
氨基醚
配体L3 +原位生成,并在添加
化学计量的Na    时结晶。将Cd(OAc)2·2H2O / L1的摩尔比提高至1.5:1或以上并将反应时间缩短至2小时后,L1被选择性地
甲醇化为L5,合并了两个CH2C(OMe)NH和一个CH2CN侧链,因为
乙酸盐仍然可以与Cd2 +结合并限制了其余腈臂的转化。通过添加Na    ,单封的三棱柱状络合物[Cd(L5)(OAc)](
ClO4)容易从
甲醇溶液中沉淀出来。与L1相反,发现Cd2