Synthesis and antimicrobial activities of N-substituted imides
作者:Frederic Zentz、Alain Valla、Regis Le Guillou、Roger Labia、Anne-Gabrielle Mathot、Danielle Sirot
DOI:10.1016/s0014-827x(02)01217-x
日期:2002.4
toluene. Most of N-substituted maleimides showed an interesting antimicrobialactivity towards bacteria from the ATCC collection (Staphylococcus aureus ATCC 25923, Enterococcus faecalis ATCC 29212, Escherichia coli ATCC 25922 and Pseudomonas aeruginosa ATCC 27853) but the MIC values for P. aeruginosa were always high (128 microg/ml). The imides with alkyl substituents showed higher activities than aromatic
A method for producing maleimides. The method comprises reacting maleic anhydride and a primary amine at 100-180° C. in an organic solvent using a solid acidic catalyst, and purifying the maleimide produced therefrom by extraction and crystallization. The molar ratio of the primary amine to maleic anhydride is about 0.8-1.6. With the present invention, high production yield with high purity of maleimides can be achieved. In addition, the solid acidic catalyst can be easily separated and recycled for subsequent use. Thus, the present invention provides a number of distinct advantages, including substantially improved yield, conveniently reusable catalyst, reduced waste disposal and lower costs.
First Triphenylphosphine PromotedReduction of Maleimides to Succinimides
作者:Venkatachalam S. Giri、Bikash Pal、Prasun K. Pradhan、Parasuraman Jaisankar
DOI:10.1055/s-2003-40523
日期:——
Triphenylphosphine (TPP) in refluxing methanol effectively reduces maleimides 1a-g to the corresponding succinimides 2a-g in good yields. It was observed that some maleimides obtained from aromatic halogen compounds 1h-j were transformed into the corresponding succinamic acid methyl esters 3a-c by this reaction.
Triethylamine-Catalyzed Synthesis of Oxazepine from Maleamic Acids
作者:Rahul Badru、Baldev Singh
DOI:10.1002/jhet.2114
日期:2015.5
2‐Thioxo‐1,3‐oxazepine‐4,7‐dione compounds were obtained via triethylamine‐catalyzed condensation of maleamicacids with thiophosgene under anhydrous conditions. This method features relatively a simple methodology, use of inexpensive reagents, convenient operating conditions and high yields.