5,6-Dihydroxyindole oligomers are valuable synthetic targets for the structural characterization of eumelanin biopolymers as well as for the realization of bioinspired functional materials. An ortho-alkynylaniline-based strategy allowed the first access to a trimer, the missing 5,5â²,5â²â²,6,6â²,6â²â²-hexaacetoxy-2,7â²:2â²,7â²â²-triindole, and its detection as a minor intermediate en route from 5,6-dihydroxyindole to eumelanin-like polymers.
5,6-二羟基吲哚低聚物是合成真黑素
生物聚合物结构特征以及实现仿生功能材料的宝贵目标。基于邻炔基
苯胺的策略首次实现了三聚体——缺失的5,5²,5²,6,6²,6²,7²,2,7²:2,7²-三
吲哚——的合成,并将其作为从
5,6-二羟基吲哚到类黑素聚合物的中间产物。