N-acetylserine were measured in the presence of (CD(3)CO)(2)O in CD(3)CO(2)D, the reactive intermediate could not be detected. This reaction was conducted without 5-methoxyindole in order to elucidate the reactive intermediate, but the intermediate could not be isolated from the reaction mixture. Since the intermediate would be expected to have a very short life time, and therefore be very difficult
研究了在AcOH中存在Ac(2)O的情况下从
吲哚和
丝氨酸仿生合成色
氨酸的反应机理。虽然在(CD(3)CO(2)D)中存在(CD(3)CO)(2)O的情况下测量了
5-甲氧基吲哚与N-乙酰
丝氨酸反应的时程(1)H-NMR谱,则无法检测到反应性中间体。为了阐明反应性中间体,在没有
5-甲氧基吲哚的条件下进行该反应,但是不能从反应混合物中分离出中间体。由于预期该中间体的寿命非常短,因此很难通过常规分析方法进行检测,因此使用2D-NMR技术,扩散有序光谱法(
DOSY)阐明了该中间体的结构。检测到两个中间体,并确认它们是2-甲基-4-亚甲基
恶唑-5(4H)-一个和2-甲基-
4-羟基甲基
恶唑-5(4H)-一个。目前的结果表明,
DOSY是检测不稳定中间体的有力工具。