Solution-phase total synthesis of the hydrophilic natural product argifin using 3,4,5-tris(octadecyloxy)benzyl tag
作者:Tomoyasu Hirose、Takako Kasai、Takafumi Akimoto、Ayako Endo、Akihiro Sugawara、Kazuo Nagasawa、Kazuro Shiomi、Satoshi Ōmura、Toshiaki Sunazuka
DOI:10.1016/j.tet.2011.05.073
日期:2011.9
solution-phase total synthesis of argifin using 3,4,5-tris(octadecyloxy)benzyl tag as a hydrophobic protective group of carboxylic acid was developed to produce 44% overall yield for 16 linear steps. Argifin, a novel class of natural product chitinase inhibitor, is a highly water-soluble cyclic pentapeptide, so hitherto, only solid-phase synthesis techniques have been used to conveniently prepare the compound
开发了使用3,4,5-三(十八烷基氧基)苄基标签作为羧酸的疏水性保护基的argifin溶液相全合成方法,在16个线性步骤中总收率为44%。Argifin是一类新型的天然产物几丁质酶抑制剂,是一种高度水溶性的环状五肽,因此,迄今为止,仅使用固相合成技术即可方便地制备该化合物及其衍生物。3,4,5-三(十八烷氧基)苄醇(HO-TAGa)及其酯是高度结晶的物质,具有很高的溶解度,可溶于二氯甲烷,苯,THF等极性较小的溶剂中,但不溶于极性溶剂例如甲醇和DMSO。HO-TAGa和基于Fmoc的肽合成相结合,并通过在MeOH溶液中重结晶进行简单纯化,