The tripeptide derivative Z(L)Ala(L/D)Phe(L)ValOMe was obtained in 40% yield by reacting (CH3S)2CN(L)CH[CH(CH3)2]COOCH3 with the dipeptide derivative Z(L)Ala(L)PheOH and ZnCl2 at 110°C. The product obtained by bulk condensation contained 9 %, the product obtained utilizing ethylene carbonate as solvent contained 10 % of the diastereomer Z(L)la(D)Phe(L)ValOMe. Separation of diastereomers
三肽衍
生物Z(L)Ala(L / d)PheValOMe通过反应在40%的收率得到(L)(CH 3 S)2 CN(L)CH [CH(CH 3)2 ]COOCH 3与二肽衍
生物Z(L)Ala(L)和PheOH
氯化锌2在110℃下。通过本体缩合获得的产物包含9%,使用
碳酸亚
乙酯作为溶剂获得的产物包含10%的非对映异构体Z 3(L)3la 1(D)3 Phe 3(L)3 Val 3 OMe。通过在
硅胶柱上的HPLC实现非对映异构体的分离。