1575-95-7Relevant articles and documents
A novel one-pot synthesis of unsymmetrical acyclic imides
Habibi, Zohreh,Salehi, Peyman,Zolfigol, Mohammad Ali,Yousefi, Maryam
, p. 812 - 814 (2007)
A new and convenient method was found for the one-pot synthesis of symmetrical and unsymmetrical linear imides by reaction of aliphatic and aromatic nitriles with acyclic carboxylic anhydrides in the presence of silica sulfuric acid as an active and recyclable reagent. Georg Thieme Verlag Stuttgart.
A solvent effect that influences the preparative utility of N- (silylalkyl)phthalimide and N-(silylalkyl)maleimide photochemistry
Yoon, Ung Chan,Oh, Sun Wha,Lee, Soo Min,Cho, Sung Ju,Gamlin, Janet,Mariano, Patrick S.
, p. 4411 - 4418 (1999)
The photochemistry of selected N-silylalkyl-substituted phthalimides and maleimides has been investigated with the aim of exploring the generality and preparative consequences of an intriguing solvent effect on excited-state reaction chemoselectivities and quantum efficiencies. An example of this effect is found in the photochemistry of N- [(trimethylsilyl)butyl]phthalimide 10, where irradiation in MeCN leads to production of a mixture of four products that arise by excited-state intramolecular hydrogen-atom abstraction. In contrast, the benzoindolizidine 15 is the sole product produced by a single electron transfer (SET)- desilylation pathway upon irradiation of 10 in 35% H2O-MeCN. Another example of this solvent effect is found in the photochemistry of the N-silylpropyl- maleimide 17. Irradiation in MeCN results in the production of the 2+2-dimer 19 whereas the pyrrolizidine 18 is generated exclusively by irradiation of 17 in 35% H2O-MeCN. The results of fluorescence and triplet sensitization experiments suggest that the solvent effect has multiple sources including the control of the nature, reactivity, and intrinsic lifetimes of singlet and triplet excited states of the phthalimide and maleimide systems. The exploratory studies have clearly demonstrated the generality of this solvent effect and how it can be used to enhance the preparative utility of the photochemistry of N-(silylalkyl)phthalimides and N-(silylalkyl)maleimides.
Palladium-Catalyzed Solvent-Controlled Selective Synthesis of Acyl Isoureas and Imides from Amides, Isocyanides, Alcohols and Carboxylates
Cao, Ming,Liu, Liqiu,Tang, Shi,Peng, Zhiyuan,Wang, Yingchun
supporting information, p. 1887 - 1895 (2019/03/11)
A highly selective synthesis of acyl isoureas and imides from readily accessible amides, isocyanides, alcohols and carboxylates based on reaction solvent selection is described. In the presence of a catalytic amount of [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) and cupric acetate, treatment of amides and isocyanides in alcohols at 60 °C provided acyl isoureas in high yields. Interestingly, when other solvents such as acetonitrile was used instead of alcohols, imides were exclusively produced in good to excellent yields via direct N-acylation of amides with carboxylates as the acyl sources. This protocol offers an attractive alternative approach toward isoureas and imides. (Figure presented.).
Method for catalytically oxidizing amine to be synthesized into amide through dipyridyl-type manganese catalyst
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Paragraph 0017-0027; 0055-0057, (2019/06/30)
The invention discloses a methodfor catalytically oxidizing amine to be synthesized into amide througha dipyridyl-type manganese catalyst. According to the method, a dipyridyl manganese complex formedafter coordination of a dipyridyl-type complex and cheap metal manganese serves as the catalyst, clean and environment-friendly hydrogen peroxide serves as an oxidizing agent, oxidation of N ortho-position sp3 C-H bonds catalyzed by the cheap metal manganese is achieved, and the amine is directly oxidized to obtain the amide. Compared with existing methods, the method has the advantages that theadopted catalyst is low in price, the preparing method is simple, raw materials are easy to obtain, the use level of the catalyst is low, the substrate range is wide, the reaction condition is mild, the operation is simple and environmentally friendly, the reaction time is short, the yield is high, the selectivity is high, and the industrialization cost is low.
Visible-Light-Driven Oxidation of N -Alkylamides to Imides Using Oxone/H 2 O and Catalytic KBr
Mei, Chong,Hu, Yixin,Lu, Wenjun
, p. 2999 - 3005 (2018/05/25)
Imides are prepared conveniently by visible-light-driven oxidations of various N -alkylamides under mild conditions. The majority of the reactions proceed efficiently by using Oxone as the oxidant in the presence of a catalytic amount of KBr in H 2 O/CH 2 Cl 2 under irradiation by an 8 W white LED at room temperature. Experimental studies suggest that an imine, obtained from the substrate amide via a radical process, is the key intermediate.
