Total Synthesis of Azulene Derivative, a Blue Pigment Isolated from <i>Lactarius indigo</i>, and Colorant Application of Its Aqueous Dispersion
作者:Kiyotaka Maruoka、Ryuju Suzuki、Takaaki Kamishima、Yoshitaka Koseki、Anh Thi Ngoc Dao、Toshihiro Murafuji、Hitoshi Kasai
DOI:10.1021/acs.jafc.3c02387
日期:2023.8.2
investigated a fat-soluble azulene derivative isolated from the mushroom Lactarius indigo as a potential candidate for a natural blue colorant. We developed its first total synthesis, where the azulene skeleton was constructed from a pyridine derivative and an ethynyl group was converted into an isopropenyl group using zirconium complexes. Moreover, nanoparticles of the azulene derivative were prepared
食品工业的安全问题增加了对天然食品着色剂的需求。然而,由于天然蓝色着色剂在自然界中稀缺,其应用范围还不够广泛,目前可用的天然蓝色染料仅限于水溶性产品。在这项研究中,我们研究了从蘑菇靛蓝中分离出的脂溶性甘菊环衍生物,作为天然蓝色着色剂的潜在候选者。我们开发了其第一个全合成,其中甘菊环骨架由吡啶衍生物构建,并使用锆配合物将乙炔基转化为异丙烯基。此外,通过再沉淀法制备了甘菊环衍生物纳米粒子,并研究了其在水溶液中的着色能力。新的候选食品着色剂在有机溶剂和水分散体中呈现深蓝色。