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.