The (1S)-sulphoxide from 5-methyldihydrothiazolo[3,2-a]pyridium-8-oxide shows positive Cotton effects at 355 and 229 mμ in alkaline solution and at 315 and 223 mμ in acid solution. The sign of an intermediate band is pH dependent. The CD curves for (3R)-8-hydroxy-5-methyldihydro[3,2-a]- pyridinium-3-carboxylate and a derived diastereomeric sulphoxide with absolute (1S,3R)-configurations are also discussed
来自5-甲基二氢
噻唑并[3,2-a]
吡啶鎓8-氧化物的(1S)亚砜在碱性溶液中在355和229mμ处以及在酸性溶液中在315和223mμ处显示出积极的棉花效应。中间带的符号是pH依赖性的。还讨论了(3R)-8-羟基-5-甲基二氢[3,2-a]-
吡啶鎓-3-
羧酸盐和衍生的具有绝对(1S,3R)-构型的非对映亚砜的CD曲线。