The synthesis of ω-di-(trideuteromethyl)-trisnorsqualenic acid has been achieved from natural squalene. The synthesis features the use of a Shapiro reaction of acetone-d6 trisylhydrazone as a key step to implement the terminal isopropylidene-d6 moiety. The obtained squalenic acid-d6 has been coupled to gemcitabine to provide the deuterated analogue of squalenoyl gemcitabine, a powerful anticancer agent endowed with self-assembling properties. The Raman spectra of both deuterated and non-deuterated squalenoyl gemcitabine nanoparticles displayed significant Raman scattering signals. They revealed no differences except from the deuterium peak patterns in the silent spectral region of cells. This paves the way for label-free intracellular trafficking studies of squalenoyl nanomedicines.
已成功从天然
角鲨烯合成了ω-二-(三
氘甲基)-三去甲基
角鲨烯酸。合成过程中采用了
丙酮-
d6三
硅基腙酮的Shapiro反应作为关键步骤,以实现末端异丙基亚甲基-
d6基团。获得的
角鲨烯酸-
d6已与
吉西他滨偶联,提供了角鲨酰基
吉西他滨的
氘代物,这是一种具有自组装性能的强效抗癌药物。
氘代和非
氘代角鲨酰基
吉西他滨纳米粒子的拉曼光谱显示出显著的拉曼散射信号。除了细胞的静默光谱区域中的
氘峰模式之外,它们没有显示出任何差异。这为无标记的细胞内运输研究提供了可能性,以研究角鲨酰基纳米药物的内在运输。