The prochiral complex Co2(CO)6(HC2Ph) (I) obtained from the reaction of Co2(CO)8 with phenylacetylene, after reaction with the optical active phosphane Glyphos (II) gives the complex Co2(CO)5(HC2Ph)(Glyphos) which consists of two diastereomers (IIIa and IIIb) differing only in the chirality of the Co2C2 cluster. IIIa and IIIb can be separated by preparative liquid chromatography. They epimerize at
由Co 2(CO)8与
苯乙炔反应制得的前手性配合物Co 2(CO)6(HC 2 Ph)(I),在与光学活性膦
草甘膦(II)反应后得到配合物Co 2(CO)5(HC 2 Ph)(
草甘膦),由两个仅在Co 2 C 2的手性上不同的非对映异构体(IIIa和IIIb)组成簇。IIIa和IIIb可通过制备
液相色谱分离。它们在较高温度下发生差向异构化,在60°C的
甲苯中达到平衡IIIa / IIIb = 6040的方法的半衰期约为170分钟。IN III与
降冰片烯(IV)的Khand反应将
环戊烯酮3一个,4,5,6,7,7一-六氢-2-苯基-4,7-亚甲基- 1 ħ
茚-1-酮(V)形成了。V的光学纯度可以通过适移试剂Pr(tfc)3来确定。平衡混合物IIIa / IIIb = 6040,得到对映体纯度为36%ee的(-)-
环戊烯酮V。光学纯(-)589如果在所使用的反应条件下差向异构作用缓慢,则-非对