Divergent Synthesis of Quinazolin-4(3<i>H</i>)-ones and Tryptanthrins Enabled by a <i>tert</i>-Butyl Hydroperoxide/K<sub>3</sub>PO<sub>4</sub>-Promoted Oxidative Cyclization of Isatins at Room Temperature
hydroperoxide/K3PO4-promoted oxidative cyclization has been developed for the facile synthesis of various functionalized quinazolin-4(3H)-ones from commercially available isatins and amidine hydrochlorides at room temperature. The synthetic utility of this strategy was illustrated by the convenientsynthesis of tryptanthrin derivatives via a self-dimerization of isatins under the same conditions.
已经开发了一种协同作用的叔丁基过氧化氢/ K 3 PO 4促进的氧化环化反应,用于在室温下容易地从市售的靛红和盐酸am合成各种功能化的喹唑啉-4(3 H)-。该策略的合成效用通过在相同条件下通过靛红素的自二聚而方便地合成色胺酮衍生物来说明。
Conversion of Isatins to Tryptanthrins, Heterocycles Endowed with a Myriad of Bioactivities
The numerous bioactivities exhibited by tryptanthrins led chemists to develop synthetic approaches towards this important scaffold. In particular, conversion of isatins into tryptanthrins has been the subject of several studies. In this context, by using iodine and potassium hydroxide at room temperature, we have discovered a simple way to convert isatin and seven of its 5-substituted derivatives (Bu
Cu-Catalyzed Synthesis of Tryptanthrin Derivatives from Substituted Indoles
作者:Chen Wang、Lianpeng Zhang、Anni Ren、Ping Lu、Yanguang Wang
DOI:10.1021/ol401144m
日期:2013.6.21
A concise method for the preparation of tryptanthrins fromindoles via the copper-catalyzed aerobic oxidation is described. The reactions can be carried out under mild reaction conditions with varying functional group tolerance.
A Biomimetic, One-Step Transformation of Simple Indolic Compounds to <i>Malassezia</i>-Related Alkaloids with High AhR Potency and Efficacy
作者:Nikitia Mexia、Stamatis Koutrakis、Guochun He、Alexios-Leandros Skaltsounis、Michael S. Denison、Prokopios Magiatis
DOI:10.1021/acs.chemrestox.9b00270
日期:2019.11.18
Malassezia furfur isolates from diseased skin preferentially biosynthesize compounds which are among the most active known aryl-hydrocarbon receptor (AhR) inducers, such as indirubin, tryptanthrin, indolo[3,2-b]carbazole, and 6-formylindolo[3,2-b]carbazole. In our effort to study their production from Malassezia spp., we investigated the role of indole-3-carbaldehyde (I3A), the most abundant metabolite