Reactions of L-tert-Leucine (tert-butylglycine), tert-leucine methyl ester, GlyValOMe, and Leu- AlaOMe with the chloro-bridged complexes [Cp*IrCl2]2, [(p-cymene)RuCl2]2 or [(C6Me6)RuCl2]2 in the presence of NaOMe give the complexes [Cp*Ir(Cl)NH2CH(R)CO2] (1), [(p-cymene)Ru(Cl)- NH2CH(R)CO2] (2), Cp*Ir(Cl2)[NH2CH(R)CO2Me] (5), (C6Me6)Ru(Cl)[NH2CH2CONHCH(R)- CO2Me]}+Cl− (6), [Cp*Ir(Cl)NH2CH2CONCH(R)CO2Me] (7), [Cp*Ir(Cl)NH2CH(CH2CHMe2)- CONCH(R)CO2Me)] (8), and Cp*Ir(Cl2)[NH2CH2CONHCH(R)CO2Me) (9).
With pentaglycine the complexes [Cp*Ir(Cl2)(pentaglycinate+Na+)] (10) and [(C6Me6)Ru(pentaglycineOMe- H+)] (11) could be isolated. Coordination of one equivalent of the S-protected tripeptide glutathione to [Cp*Ir(Cl)] and to [(C6Me6)Ru(Cl)] was observed. Some in situ prepared (p-cymene)Ru complexes with deprotonated dipeptide esters were tested as catalysts and the complex [(p-cymene)Ru(Cl)(NH2CH(CHMeEt)NCH (CHMe2)CO2tert-Bu)] gave a yield of 73% and moderate entantiomeric excess (36% ee) in the transfer hydrogenation of acetophenone to 2-propanol.
与五甘氨酸配合物 [Cp*Ir(Cl2)(五甘氨酸盐+Na+)] (10) 和 [(C6Me6)Ru(五甘氨酸甲酯- H+)] (11) 可以被分离。观察到一等量 S-保护的三肽谷胱甘肽与 [Cp*Ir(Cl)] 和 [(C6Me6)Ru(Cl)] 的配位。一些原位制备的 (p-环己烯)Ru 配合物与去质子化的二肽酯作为催化剂,复合物 [(p-环己烯)Ru(Cl)(NH2CH(CHMeEt)NCH (CHMe2)CO2叔丁基)] 在苯乙酮转移氢化为异丙醇中产率为73%,对映选择性中等(36% ee)。