A novel rearrangement of fluorescent human thymidylate synthase inhibitor analogues in ESI tandem mass spectrometry
作者:Yi Chen、Céline Le Droumaguet、Kai Li、William E. Cotham、Norman Lee、Mike Walla、Qian Wang
DOI:10.1016/j.jasms.2009.11.004
日期:2010.3.1
Cu(I) catalyzed alkyne-azide cycloaddition reaction was employed to synthesize a series of anthracene-based human thymidylate synthase (hTS) inhibitor analogues. The triazolo-anthracene derivatives were characterized by ESI-MS/MS and a novel rearrangement reaction in ESI-MS/MS was observed. The mechanism is proposed whereby the protonated triazolo-anthracene derivative forms a carbocation, and then
Cu(I) 催化的炔-叠氮化物环加成反应用于合成一系列基于蒽的人胸苷酸合酶 (hTS) 抑制剂类似物。三唑并蒽衍生物通过 ESI-MS/MS 进行表征,并在 ESI-MS/MS 中观察到新的重排反应。提出的机制是质子化的三唑并蒽衍生物形成碳正离子,然后碳正离子亲电攻击蒽部分,导致形成重排离子。此外,碳正离子更倾向于通过亲电取代机制攻击 γ 位置而不是蒽部分的 α 或 β 位置。