by the acid-catalyzed condensation of Indoles with 2,5-dichiorobenzoquinone, followed by DDQoxidation. The resulting dichloroquinones are hydrolyzed to the 3-indolyidihydroxybenzoquinones. The 3-indolylquinone substructure is of interest because of its presence in naturalproducts that modulate biological processes through protein-protein interactions, including the asterriquinones.
Pyrrolylquinones and indolylquinones useful for treating diseases such as neurodegenerative disease, viral infections and proliferative disease are described, along with methods of making such compounds and pharmaceutical formulations containing such compounds.
AsterriquinoneD was easily synthesized in three steps from 2,5-dichloro-1,4-benzoquinone. The reaction of benzoquinone with indole in the presence of Pd(OAc)2, followed by oxidation with cerium (IV) ammonium nitrate (CAN) produced 3,6-dichloro-2,5-bis (3-indolyl)-1,4-benzoquinone. The methoxylation of the dichloride with NaOH in CH3OH afforded asterriquinoneD.
One‐Pot Mechanochemical Synthesis of Mono‐ and Bis‐Indolylquinones via Solvent‐Free Multiple Bond‐Forming Processes
作者:Marta Piquero、Cristina Font、Natalia Gullón、Pilar López‐Alvarado、J. Carlos Menéndez
DOI:10.1002/cssc.202101529
日期:2021.11.4
with fungi: Bis-indolylquinones are fungal natural products endowed with interesting pharmacological properties. Here a new one-pot mechanochemical methodology for the synthesis of indolylquinones is described, which takes place via domino Michael addition/oxidation processes starting from indoles and dihaloquinones in the presence of FeCl3 or p-TsOH as catalysts and Fetizon's reagent as an oxidant