描述了一种在KHCO 3作为碱存在下,用两种相同的靛红铜( I ) 催化制备色胺菊酯及其衍生物的温和方法。此外,更复杂的色胺酮衍生物通过两步获得,一锅使用两种不同的靛红。该工作具有原料易得、反应条件温和、操作简单、官能团耐受性好、收率高、选择性高等特点。这种转化不仅为获取色胺酮及其衍生物提供了一种新方法,而且丰富了靛红和铜催化的化学性质。
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。
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.
An electrooxidative reconstruction of the indole core under ambient conditions is reported, resulting in the construction of tryptanthrins. This electrochemical strategy simplifies molecular skeleton-hopping by employing commercially available NH-indole feedstock as the starting materials. Furthermore, the synthetic value of this skeletal reconstruction was demonstrated by divergent further transformations
据报道,在环境条件下吲哚核心的电氧化重建,导致色胺酮的构建。这种电化学策略通过使用市售的 NH-吲哚原料作为起始材料,简化了分子骨架跳跃。此外,这种骨骼重建的综合价值通过不同的进一步变换得到了证明。涉及控制实验和循环伏安研究的初步机理研究表明电的必要性以及氧气和 TEMPO 的重要性,从而揭示了可能的反应途径。