Optically pure (R)- and (S)-3-aminotetradeutero-2-thiophenone (D- and L-[2H4]homocysteine thiolactone) for use as substrates for metabolic and pharmacokinetic studies has been prepared. The racemic [2H4]homocysteine thiolactone hydrochloride was prepared from commercially available and highly enriched DL-[3,3,4,4-2H4]methionine by intramolecular condensation with hydriodic acid. The racemate was derivatized with (S)-(+)-2-methoxyphenylacetic acid to form the diastereomeric amides. The diastereomers were separated by silica gel column chromatography. Hydrolysis of the D- and L-isomer amide in 4 M HCl–ethanol (1:2 v/v) afforded the optically pure D- and L-[2H4]homocysteine thiolactone, respectively. Copyright © 2010 John Wiley & Sons, Ltd.
制备了光学纯度为 (R)- 和 (S)-3-aminotetradeutero-2-thiophenone (D- 和 L-[2H4]同型半胱
氨酸
硫内酯),可用作代谢和药代动力学研究的底物。外消旋[2H4]
高半胱氨酸硫内酯盐酸盐是通过分子内缩合与
氢碘酸从市售的高浓缩 DL-[3,
3,4,4-2H4]蛋
氨酸中制备的。外消旋体用(S)-(+)-
2-甲氧基苯乙酸衍生,形成非对映异构体酰胺。非对映异构体通过
硅胶柱色谱法分离。在 4 M HCl-
乙醇(1:2 v/v)中
水解 D-和 L-异构体酰胺,分别得到光学纯度为 D-和 L-[2H4]
高半胱氨酸硫内酯。Copyright © 2010 John Wiley & Sons, Ltd. All Rights Reserved.