Monofunctionalization of the calix[4]arene upper-rim is
achieved by lithiation with BunLi, followed by phosphination
with Ph2PCl of monobromotetra-n-propoxycalix[4]arene;
subsequent reactions with [Cp*RhIIICl2]2
and Cp*RhI(CO)2 provide the corresponding
Cp*[Ph2(calix)P]RhIIICl2, which can be
converted to Cp*[Ph2(calix)P]RhIII(H)2 and
Cp*[Ph2(calix)P]RhI(CO), respectively.
先用 BunLi
锂化,再用 Ph2PCl
磷化一
溴四-正丙氧基萼[4]炔,从而实现萼[4]炔上缘的单官能化;
随后与[Cp*RhIIICl2]2 和 Cp*RhI(CO)2 反应生成相应的 Cp*[Ph2(calix)P]RhIIICl2,可分别转化为 Cp*[Ph2(calix)P]RhIII(H)2 和 Cp*[Ph2(calix)P]RhI(CO)。