Optical resolution of a new antidiabetic agent, (±)-5-[4-(1-methylcyclohexylmethoxy) benzyl]-2, 4-thiazolidinedione (1, ciglitazone) with (-)-and (+)-1-phenylethylamine (PEA) in ethyl acetate resulted in almost complete asymmetric transformation to give the salts, (-)-1·(-)-PEA and (+)-1·(+)-PEA, respectively, in up to quantitative yields. Optical purities of (-)-and (+)-1 obtained from the salts were determined by nuclear magnetic resonance and their absolute configurations were confirmed chemically. The optical isomers showed essentially the same antidiabetic and hypolipidemic activities.
在
乙酸乙酯中对一种新型抗糖尿病药物(±)-5-[4-(1-甲基环己基甲氧基)苄基]-2, 4-
噻唑烷二酮(1, ciglitazone)与(-)-和(+)-1-苯
乙胺(
PEA)进行光学解析,结果几乎完全不对称转化,分别得到了(-)-1-(-)-
PEA和(+)-1-(+)-
PEA这两种盐,产量可达定量。通过核磁共振测定了从这些盐中得到的(-)-和(+)-1的光学纯度,并通过
化学方法确认了它们的绝对构型。这两种光学异构体显示出基本相同的抗糖尿病和降血脂活性。