low-valent titanium generated in a mixed solvent of DME and toluene favored reductive cyclo-oligomerization to give macrocyclic cyclophanepolyenes in relatively good yields leading to improved or new synthesis of a series of cyclic paraphenylacetylenes ([6] to [9]CPPAs).
用二
甲醚和
甲苯的混合溶剂中生成的低价
钛处理
二苯乙烯二醛衍
生物,有助于还原性环状低聚,从而以相对较高的收率得到大环环烯多烯,从而改善或合成了一系列环状对
苯乙炔([6]至[9] ] C
PPA)。