Cyanuric chloride: decent dehydrating agent for an exclusive and efficient synthesis of kinetically controlled isomaleimides
作者:Kishan P. Haval、Santosh B. Mhaske、Narshinha P. Argade
DOI:10.1016/j.tet.2005.10.027
日期:2006.1
Starting from maleanitic and maleamic acids, a facile general approach to kinetically controlled isomaleimides has been described for the first time using cyanuric chloride as a dehydrating agent with 85-98% yields. The effect of a variety of substituents present on the aromatic ring in amine and maleic anhydride moiety, on these kinetic/thermodynamic dehydration processes of anilic acids has been also described. Under the same set of reaction conditions the phthalanilic acid gave kinetically controlled product, isoplitalimide in 91% yield, while the corresponding succinanilic acid furnished the thermodynamically more stable succinimide in high yield. (c) 2005 Elsevier Ltd. All rights reserved.
Electrochemical Conversion of Phthaldianilides to Phthalazin-1,4-diones by Dehydrogenative N−N Bond Formation
作者:Anton Kehl、Tile Gieshoff、Dieter Schollmeyer、Siegfried R. Waldvogel
DOI:10.1002/chem.201705578
日期:2018.1.12
The electrochemical synthesis of 6‐membered rings via anodic dianilide N−N coupling is challenging due to concurring benzoxazole co‐formation. The rigidity of the a phthalic acid backbone allows a novel access to phthalazin‐1,4‐diones by N−Nbondformation using anodically generated amidyl radicals. Since conventional synthetic routes to phthalazin‐1,4‐diones require the use of toxic N,N′‐diarylhydrazines
Efficient synthesis of cyclic imides by the tandem N-arylation-acylation and rearrangement reaction of cyanoesters with diaryliodonium salts
作者:Zhiyuan Bao、Chao Chen
DOI:10.1016/j.cclet.2022.107913
日期:2023.5
multi-substituted cyclicimides was developed with cyanoesters and diaryliodonium salts. This method proceeds through a cascade of N-arylation-acylation and rearrangement to give target heterocycles in good yields (up to 99%). This method has the major advantages of a broad substrate scope, excellent functional group compatibility. The strategy was also extended to the fused cyclicimides, such as malonimides