Triton B–Assisted, Efficient, and Convenient Synthesis of 3-Indolyl-3-hydroxy Oxindoles in Aqueous Medium
作者:H. M. Meshram、D. Aravind Kumar、P. Ramesh Goud、B. Chennakesava Reddy
DOI:10.1080/00397910902916072
日期:2009.12.15
An efficient and convenient synthesis of 3-indolyl-3-hydroxy oxindole is described by the reaction of isatin with indole in the presence of Triton B in an aqueous medium.
在水性介质中,在 Triton B 存在下,靛红与吲哚反应,描述了一种有效且方便的 3-吲哚基-3-羟基羟吲哚合成。
Application of cellulose/chitosan grafted nano-magnetites as efficient and recyclable catalysts for selective synthesis of 3-indolylindolin-2-ones
作者:Kurosh Rad-Moghadam、Negin Dehghan
DOI:10.1016/j.molcata.2014.05.005
日期:2014.10
Cellulose grafted to nano-magnetites was found to be an efficient biopolymer composite for catalysis of Friedel Crafts reaction between isatins and indoles, leading to selective synthesis of 3-hydroxy-3-indolylindolin-2-ones. The catalysis process is likely effected by a mass of hydroxyl groups arranged along the backbone of cellulose fibers coated on surface of the nano-sized magnetite support, where they get exposed to the adsorbed substrates. Synergistic push-pull effects, reminiscent of the soft catalysis of metal-less enzymes, via proton donating-accepting functions of the hydroxyl groups anchored on surface of the cellulose shell were invoked to explain the clean and selective bioorganocatalysis of 3-indolylindolin-2-one formation. In addition, more improvement in this selective catalytic performance was realized by employing the magnetite nano-particles coated with chitosan shell. (C) 2014 Elsevier B.V. All rights reserved.